The Smart Device Compare comparison

Shelly Presence Gen4 vs Sonoff SenseGuard Presence Core

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Shelly Presence Gen4 and Sonoff SenseGuard Presence Core

A summary of selected recorded differences between these presence sensors. Check the full specification table below for details and conditions.

Feature differences among your selected devices

2.4 GHz Wi-Fi (connectivity): Shelly Presence Gen4 — Yes (Wi-Fi 6, 802.11 b/g/n/ax on 2401-2483 MHz.); Sonoff SenseGuard Presence Core — No.
Multi Person Detection (features): Shelly Presence Gen4 — Yes (Identifies up to 6 people at once and maps them onto up to 10 customizable detection zones.); Sonoff SenseGuard Presence Core — No (The radar answers occupied or not occupied. SONOFF never claims people counting, and Zigbee2MQTT exposes a single occupancy binary rather than per-target data.).

Specifications to check side by side

Bluetooth (connectivity): Shelly Presence Gen4 — Yes (Bluetooth 5 LE for onboarding.); Sonoff SenseGuard Presence Core — For Pairing (Bluetooth LE is used by the eWeLink BLE Setup flow to add the device and to configure the detection zones and Detection Calibration locally, which is how third-party platform users reach those settings. All reporting still happens over Zigbee.).
Angle Of Detection (features): Shelly Presence Gen4 — 140° Horizontal / 120° Vertical; Sonoff SenseGuard Presence Core — 120° (SONOFF's detection-range section states a 120° detection angle, matching the figure in SmartHomeScene's hands-on. The highlights blurb on the same help center page says 110°, which is the angle of the older SNZB-06P.).
Range Of Detection (features): Shelly Presence Gen4 — 8m / 26ft; Sonoff SenseGuard Presence Core — 4m / 13ft (Radial detection distance of about 4 meters, split into seven independent zones of 0.5m that can each be switched off in the app to mask a doorway or a desk fan.).
Apple Home (integrations): Shelly Presence Gen4 — Yes (Via Matter); Sonoff SenseGuard Presence Core — SONOFF Hub required (The sensor has no HomeKit profile of its own. SONOFF documents Apple Home support through its own Matter bridges (ZBBridge-U, iHost, eWeLink CUBE), which republish the Zigbee device into the Apple ecosystem.).

Information still to confirm

3 of 25 comparison fields lack a resolved value for at least one selected device. Missing information is not evidence that a feature is absent.
Check the full table and manufacturer documentation before ruling out a device.

These observations are derived from recorded catalog data and have not all been independently verified. Confirm details with the manufacturer before purchasing.

Compare capabilities, compatibility and setup requirements.

Option 1 · Shelly

Shelly Presence Gen4

Last updated October 2026

View full device profile

Option 2 · Sonoff

Sonoff SenseGuard Presence Core

Catalog update date not recorded

View full device profile

What the catalog tells us

Understand the tradeoffs.

These counts describe the available data, not a quality score. More features do not automatically make a better device.

8differences with recorded values for every device

3rows with missing or unspecified information

Consider your setup

Apple Home

Shelly Presence Gen4Yes
Sonoff SenseGuard Presence CoreSONOFF Hub required

Confirm which features appear in Apple Home and whether extra hardware or a subscription is needed for your intended use.

Inspect the specifications

Consider your setup

Matter

Shelly Presence Gen4Yes
Sonoff SenseGuard Presence CoreSONOFF Hub required

Confirm the exact device type and the features exposed in your chosen platform. Protocol support does not establish feature parity across apps.

Inspect the specifications

Your priorities, side by side

Focus on what changes.

Mark the specifications you care about. Open manufacturer sources for verification scope; fields without citations remain catalog data. Expand notes for other qualifications.

Differences onlyMy priorities (0)

Showing 25 of 25 rows. “Not recorded” does not mean “No”.

Reading layout

Alerts

Fall Alerts

Shelly Presence Gen4: No
Sonoff SenseGuard Presence Core: No

Presence Alerts

Shelly Presence Gen4: Yes
Catalog note
Presence and vacancy can trigger lights, HVAC, blinds, security or a notification through Shelly Smart Control, Matter or local webhooks.
Sonoff SenseGuard Presence Core: Yes
Catalog note
Presence and absence events drive scenes and notifications, with a configurable occupancy timeout before the room is reported empty.

Connectivity

2.4 GHz Wi-Fi

Shelly Presence Gen4: Yes
Catalog note
Wi-Fi 6, 802.11 b/g/n/ax on 2401-2483 MHz.
Sonoff SenseGuard Presence Core: No

5 GHz Wi-Fi

Shelly Presence Gen4: No
Sonoff SenseGuard Presence Core: No

Bluetooth

Shelly Presence Gen4

Yes

Manufacturer source

Bluetooth 5 LE is specified.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Bluetooth 5 LE for onboarding.

Sonoff SenseGuard Presence Core

For Pairing

Catalog note

Bluetooth LE is used by the eWeLink BLE Setup flow to add the device and to configure the detection zones and Detection Calibration locally, which is how third-party platform users reach those settings. All reporting still happens over Zigbee.

Thread

Shelly Presence Gen4: No
Sonoff SenseGuard Presence Core: No

Z Wave

Shelly Presence Gen4: No
Sonoff SenseGuard Presence Core: No

Zigbee

Shelly Presence Gen4: Zigbee Hub required
Catalog note
Zigbee 3.0 (802.15.4). A five-press on the button switches the firmware between Matter over Wi-Fi (the default) and Zigbee. Using the Zigbee radio needs a Zigbee coordinator.
Sonoff SenseGuard Presence Core: Zigbee Hub required
Catalog note
Zigbee 3.0 (IEEE 802.15.4) end device with an open-area range of 100m. It needs a Zigbee coordinator: a SONOFF gateway, or any Zigbee 3.0 hub such as a Zigbee2MQTT or ZHA dongle.

Features

Angle Of Detection

Shelly Presence Gen4: 140° Horizontal / 120° Vertical
Sonoff SenseGuard Presence Core: 120°
Catalog note
SONOFF's detection-range section states a 120° detection angle, matching the figure in SmartHomeScene's hands-on. The highlights blurb on the same help center page says 110°, which is the angle of the older SNZB-06P.

Area Of Detection

Shelly Presence Gen4

42 m²

Manufacturer source

The stated detection area is up to 42 square metres.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Sonoff SenseGuard Presence Core

Not recorded

Automations

Shelly Presence Gen4: Yes
Catalog note
20 schedules, scripting, MQTT, 20 webhooks and local logic on the device, plus Matter occupancy for platform automations.
Sonoff SenseGuard Presence Core: Yes
Catalog note
Presence and the lux reading can both trigger eWeLink scenes, which is how SONOFF pitches it for lighting that only turns on when the room is dark and occupied.

History Records

Shelly Presence Gen4: Not recorded
Sonoff SenseGuard Presence Core: Yes
Catalog note
eWeLink keeps occupancy detection logs and a record of the light level over time, which SONOFF also allows exporting.

Multi Person Detection

Shelly Presence Gen4

Yes

Manufacturer source

The sensor supports simultaneous detection of multiple occupants.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Identifies up to 6 people at once and maps them onto up to 10 customizable detection zones.

Sonoff SenseGuard Presence Core

Catalog note

The radar answers occupied or not occupied. SONOFF never claims people counting, and Zigbee2MQTT exposes a single occupancy binary rather than per-target data.

Range Of Detection

Shelly Presence Gen4

8m / 26ft

Sonoff SenseGuard Presence Core

4m / 13ft

Manufacturer source

The advertised detection range is up to four metres.

Sonoff SenseGuard Presence Core manufacturer product page →

Source section: Product description
Model: Sonoff SenseGuard Presence Core
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Range depends on placement and environmental interference.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Radial detection distance of about 4 meters, split into seven independent zones of 0.5m that can each be switched off in the app to mask a doorway or a desk fan.

Sleep Monitoring

Shelly Presence Gen4: No
Sonoff SenseGuard Presence Core: No
Catalog note
SONOFF states the device cannot accurately detect a sleeping person, because the chest movement of breathing during sleep is too subtle for it.

Zigbee Router

Shelly Presence Gen4

Not recorded

Catalog note

USB-C powered and able to join a Zigbee network, but Shelly's knowledge base does not say whether it repeats traffic as a Zigbee router.

Sonoff SenseGuard Presence Core

Yes

Manufacturer source

The device can repeat Zigbee signals.

Sonoff SenseGuard Presence Core manufacturer product page →

Source section: Product description
Model: Sonoff SenseGuard Presence Core
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Range depends on placement and environmental interference.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

SONOFF states the device can act as a Zigbee router and extend the coverage of the mesh, which its permanent USB-C power allows.

Integrations

Alexa

Shelly Presence Gen4: Yes
Catalog note
Via Matter. Shelly also lists the Alexa Motion Sensor capability.
Sonoff SenseGuard Presence Core: Yes
Catalog note
SONOFF lists Alexa among the third-party platforms that can query the motion status, through the eWeLink cloud-to-cloud integration behind a SONOFF Zigbee gateway.

Apple Home

Shelly Presence Gen4: Yes
Catalog note
Via Matter
Sonoff SenseGuard Presence Core: SONOFF Hub required
Catalog note
The sensor has no HomeKit profile of its own. SONOFF documents Apple Home support through its own Matter bridges (ZBBridge-U, iHost, eWeLink CUBE), which republish the Zigbee device into the Apple ecosystem.

Google Home

Shelly Presence Gen4: Yes
Catalog note
Via Matter. Shelly also lists the Google Smart Home Occupancy Sensing trait.
Sonoff SenseGuard Presence Core: Yes
Catalog note
SONOFF lists Google Home among the third-party platforms that can query the occupancy status, once the sensor is added to eWeLink through a SONOFF Zigbee gateway and synced cloud to cloud.

Home Assistant

Shelly Presence Gen4: Yes
Catalog note
Via Matter. Shelly's knowledge base also lists Home Assistant as a supported platform, plus local MQTT, webhooks and an embedded web interface.
Sonoff SenseGuard Presence Core: Yes
Catalog note
Zigbee2MQTT supports the exact model and exposes occupancy, illuminance, the occupancy timeout, radar sensitivity, the seven detection zones and the spatial learning calibration. SONOFF also documents ZHA, which currently needs a quirk script it provides.

Matter

Shelly Presence Gen4

Yes

Manufacturer source

Matter uses the Wi-Fi connection.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Matter over Wi-Fi. CSA certificate CSA25E3FMAT48529-24, certified 2025-11-18, vendor 0x1490 product 0x1821.

Sonoff SenseGuard Presence Core

SONOFF Hub required

Catalog note

The device is Zigbee, not Matter. SONOFF's own Matter bridges (ZBBridge-U, iHost, eWeLink CUBE) are what expose it to a Matter fabric.

SmartThings

Shelly Presence Gen4: Yes
Catalog note
Via Matter. Shelly also lists the SmartThings Presence Sensor capability.
Sonoff SenseGuard Presence Core: Yes
Catalog note
SONOFF publishes a SmartThings driver for the model and links the channel invite from its help center page; the device then reports occupancy in SmartThings.

Power

Wired

Shelly Presence Gen4

Yes

Manufacturer source

Continuous power is supplied through 5 V USB-C.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Sonoff SenseGuard Presence Core

USB-C

Catalog note

Permanently powered over a USB-C port rated 5V 0.5A. There is no battery option, so the sensor has to stay plugged in.

Sensors

Light

Shelly Presence Gen4

Yes

Manufacturer source

The light sensor reports dark, twilight and bright states.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Built-in light sensor that reports dark, twilight and bright states for lighting-aware automations.

Sonoff SenseGuard Presence Core

Yes

Manufacturer source

Ambient light sensing is included.

Sonoff SenseGuard Presence Core manufacturer product page →

Source section: Product description
Model: Sonoff SenseGuard Presence Core
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Range depends on placement and environmental interference.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

Ambient light sensor reporting a lux value, with a calibration offset and a history log. Zigbee2MQTT exposes illuminance and the illuminance calibration.

Presence

Shelly Presence Gen4

Yes

Manufacturer source

Presence detection uses millimetre-wave radar.

Shelly Presence Gen4 manufacturer product page →

Source section: Technical details: device description and main features
Model: Shelly Presence Gen4
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

60-64 GHz mmWave radar that detects people who are sitting still, with still detection out to 3 m and tracking of up to 6 people across up to 10 zones.

Sonoff SenseGuard Presence Core

Yes

Manufacturer source

Presence sensing uses 24 GHz radar.

Sonoff SenseGuard Presence Core manufacturer product page →

Source section: Product description
Model: Sonoff SenseGuard Presence Core
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Range depends on placement and environmental interference.

Document check only; not a hands-on test or verification of every regional or firmware variant.

Catalog note

24GHz mmWave radar that reads micro-movements such as the chest expansion of breathing, so it holds detection on someone sitting still. SONOFF notes a completely motionless person is best detected within 3 meters facing the device, and that it cannot reliably detect a sleeping person.

Specifications for Shelly Presence Gen4 versus Sonoff SenseGuard Presence Core
Specification	Shelly Presence Gen4	Sonoff SenseGuard Presence Core
Alerts
Fall Alerts	No	No
Presence Alerts	Yes Catalog note Presence and vacancy can trigger lights, HVAC, blinds, security or a notification through Shelly Smart Control, Matter or local webhooks.	Yes Catalog note Presence and absence events drive scenes and notifications, with a configurable occupancy timeout before the room is reported empty.
Connectivity
2.4 GHz Wi-Fi	Yes Catalog note Wi-Fi 6, 802.11 b/g/n/ax on 2401-2483 MHz.	No
5 GHz Wi-Fi	No	No
Bluetooth	Yes Manufacturer source Bluetooth 5 LE is specified. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Bluetooth 5 LE for onboarding.	For Pairing Catalog note Bluetooth LE is used by the eWeLink BLE Setup flow to add the device and to configure the detection zones and Detection Calibration locally, which is how third-party platform users reach those settings. All reporting still happens over Zigbee.
Thread	No	No
Z Wave	No	No
Zigbee	Zigbee Hub required Catalog note Zigbee 3.0 (802.15.4). A five-press on the button switches the firmware between Matter over Wi-Fi (the default) and Zigbee. Using the Zigbee radio needs a Zigbee coordinator.	Zigbee Hub required Catalog note Zigbee 3.0 (IEEE 802.15.4) end device with an open-area range of 100m. It needs a Zigbee coordinator: a SONOFF gateway, or any Zigbee 3.0 hub such as a Zigbee2MQTT or ZHA dongle.
Features
Angle Of Detection	140° Horizontal / 120° Vertical	120° Catalog note SONOFF's detection-range section states a 120° detection angle, matching the figure in SmartHomeScene's hands-on. The highlights blurb on the same help center page says 110°, which is the angle of the older SNZB-06P.
Area Of Detection	42 m² Manufacturer source The stated detection area is up to 42 square metres. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant.	Not recorded
Automations	Yes Catalog note 20 schedules, scripting, MQTT, 20 webhooks and local logic on the device, plus Matter occupancy for platform automations.	Yes Catalog note Presence and the lux reading can both trigger eWeLink scenes, which is how SONOFF pitches it for lighting that only turns on when the room is dark and occupied.
History Records	Not recorded	Yes Catalog note eWeLink keeps occupancy detection logs and a record of the light level over time, which SONOFF also allows exporting.
Multi Person Detection	Yes Manufacturer source The sensor supports simultaneous detection of multiple occupants. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Identifies up to 6 people at once and maps them onto up to 10 customizable detection zones.	No Catalog note The radar answers occupied or not occupied. SONOFF never claims people counting, and Zigbee2MQTT exposes a single occupancy binary rather than per-target data.
Range Of Detection	8m / 26ft	4m / 13ft Manufacturer source The advertised detection range is up to four metres. Sonoff SenseGuard Presence Core manufacturer product page → Source section Product description Model Sonoff SenseGuard Presence Core Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Range depends on placement and environmental interference. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Radial detection distance of about 4 meters, split into seven independent zones of 0.5m that can each be switched off in the app to mask a doorway or a desk fan.
Sleep Monitoring	No	No Catalog note SONOFF states the device cannot accurately detect a sleeping person, because the chest movement of breathing during sleep is too subtle for it.
Zigbee Router	Not recorded Catalog note USB-C powered and able to join a Zigbee network, but Shelly's knowledge base does not say whether it repeats traffic as a Zigbee router.	Yes Manufacturer source The device can repeat Zigbee signals. Sonoff SenseGuard Presence Core manufacturer product page → Source section Product description Model Sonoff SenseGuard Presence Core Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Range depends on placement and environmental interference. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note SONOFF states the device can act as a Zigbee router and extend the coverage of the mesh, which its permanent USB-C power allows.
Integrations
Alexa	Yes Catalog note Via Matter. Shelly also lists the Alexa Motion Sensor capability.	Yes Catalog note SONOFF lists Alexa among the third-party platforms that can query the motion status, through the eWeLink cloud-to-cloud integration behind a SONOFF Zigbee gateway.
Apple Home	Yes Catalog note Via Matter	SONOFF Hub required Catalog note The sensor has no HomeKit profile of its own. SONOFF documents Apple Home support through its own Matter bridges (ZBBridge-U, iHost, eWeLink CUBE), which republish the Zigbee device into the Apple ecosystem.
Google Home	Yes Catalog note Via Matter. Shelly also lists the Google Smart Home Occupancy Sensing trait.	Yes Catalog note SONOFF lists Google Home among the third-party platforms that can query the occupancy status, once the sensor is added to eWeLink through a SONOFF Zigbee gateway and synced cloud to cloud.
Home Assistant	Yes Catalog note Via Matter. Shelly's knowledge base also lists Home Assistant as a supported platform, plus local MQTT, webhooks and an embedded web interface.	Yes Catalog note Zigbee2MQTT supports the exact model and exposes occupancy, illuminance, the occupancy timeout, radar sensitivity, the seven detection zones and the spatial learning calibration. SONOFF also documents ZHA, which currently needs a quirk script it provides.
Matter	Yes Manufacturer source Matter uses the Wi-Fi connection. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Matter over Wi-Fi. CSA certificate CSA25E3FMAT48529-24, certified 2025-11-18, vendor 0x1490 product 0x1821.	SONOFF Hub required Catalog note The device is Zigbee, not Matter. SONOFF's own Matter bridges (ZBBridge-U, iHost, eWeLink CUBE) are what expose it to a Matter fabric.
SmartThings	Yes Catalog note Via Matter. Shelly also lists the SmartThings Presence Sensor capability.	Yes Catalog note SONOFF publishes a SmartThings driver for the model and links the channel invite from its help center page; the device then reports occupancy in SmartThings.
Power
Wired	Yes Manufacturer source Continuous power is supplied through 5 V USB-C. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Powered by USB-C at 5 VDC, 1 A. Nominal consumption 2.5 W, 3.5 W maximum. There is no battery option.	USB-C Catalog note Permanently powered over a USB-C port rated 5V 0.5A. There is no battery option, so the sensor has to stay plugged in.
Sensors
Light	Yes Manufacturer source The light sensor reports dark, twilight and bright states. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Built-in light sensor that reports dark, twilight and bright states for lighting-aware automations.	Yes Manufacturer source Ambient light sensing is included. Sonoff SenseGuard Presence Core manufacturer product page → Source section Product description Model Sonoff SenseGuard Presence Core Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Range depends on placement and environmental interference. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Ambient light sensor reporting a lux value, with a calibration offset and a history log. Zigbee2MQTT exposes illuminance and the illuminance calibration.
Presence	Yes Manufacturer source Presence detection uses millimetre-wave radar. Shelly Presence Gen4 manufacturer product page → Source section Technical details: device description and main features Model Shelly Presence Gen4 Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Coverage is a manufacturer maximum, not a measured result for every room. The page gives conflicting occupant limits in different sections; no exact occupant count is asserted here. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note 60-64 GHz mmWave radar that detects people who are sitting still, with still detection out to 3 m and tracking of up to 6 people across up to 10 zones.	Yes Manufacturer source Presence sensing uses 24 GHz radar. Sonoff SenseGuard Presence Core manufacturer product page → Source section Product description Model Sonoff SenseGuard Presence Core Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Range depends on placement and environmental interference. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note 24GHz mmWave radar that reads micro-movements such as the chest expansion of breathing, so it holds detection on someone sitting still. SONOFF notes a completely motionless person is best detected within 3 meters facing the device, and that it cannot reliably detect a sleeping person.

Know what’s behind the comparison.

The table matches specifications by section and field. It preserves notes, separates missing data from explicit “No” values, and keeps qualifications attached to their values. No overall winner is assigned from feature counts.

Read our comparison methodology