The Smart Device Compare comparison

Shelly H&T Gen3 vs Sonoff SNZB-02UL AirGuard E-Ink TH

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Shelly H&T Gen3 and Sonoff SNZB-02UL AirGuard E-Ink TH

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

Feature differences among your selected devices

2.4 GHz Wi-Fi (connectivity): Shelly H&T Gen3 — Yes (802.11 b/g/n); Sonoff SNZB-02UL AirGuard E-Ink TH — No.
Date (display): Shelly H&T Gen3 — No; Sonoff SNZB-02UL AirGuard E-Ink TH — Yes (The screen displays the date once the device is connected to a gateway or Home Assistant.).
Weather Forecast (display): Shelly H&T Gen3 — No; Sonoff SNZB-02UL AirGuard E-Ink TH — Yes (Once paired to a SONOFF Zigbee gateway or Home Assistant, the screen shows a weather icon and weather information alongside the reading.).

Specifications to check side by side

Bluetooth (connectivity): Shelly H&T Gen3 — For Pairing; Sonoff SNZB-02UL AirGuard E-Ink TH — No.
Zigbee (connectivity): Shelly H&T Gen3 — No; Sonoff SNZB-02UL AirGuard E-Ink TH — Zigbee Hub required (Zigbee 3.0 (IEEE 802.15.4) end device. SONOFF lists the ZBBridge-P, ZBBridge-U, Bridge-M, NSPanel Pro and iHost as its own gateways, plus the Aeotec SmartThings Hub V3 and the Zigbee Echo models. Time, date and weather on the screen need a gateway or Home Assistant.).
Screen Type (display): Shelly H&T Gen3 — e-paper; Sonoff SNZB-02UL AirGuard E-Ink TH — E-Ink.
Apple Home (integrations): Shelly H&T Gen3 — Yes (Via Matter, from firmware 1.6 onwards.); Sonoff SNZB-02UL AirGuard E-Ink TH — SONOFF Hub required (The device is Zigbee, not HomeKit. SONOFF republishes it into the Apple Home app through its own Matter bridges (Bridge-M, ZBBridge-U, iHost, eWeLink CUBE).).

Information still to confirm

3 of 35 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 H&T Gen3

Last updated October 2026

View full device profile

Option 2 · Sonoff

Sonoff SNZB-02UL AirGuard E-Ink TH

Last updated October 2026

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.

10differences with recorded values for every device

3rows with missing or unspecified information

Consider your setup

Apple Home

Shelly H&T Gen3Yes
Sonoff SNZB-02UL AirGuard E-Ink THSONOFF 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 H&T Gen3Yes
Sonoff SNZB-02UL AirGuard E-Ink THSONOFF 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

Consider your setup

Battery Life

Shelly H&T Gen31 year
Sonoff SNZB-02UL AirGuard E-Ink TH8+ months

Compare the stated test conditions. Catalog battery figures alone do not predict runtime in your home.

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 35 of 35 rows. “Not recorded” does not mean “No”.

Reading layout

Alerts

Air Quality Alerts

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Humidity Alerts

Shelly H&T Gen3: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes

Low Battery Alerts

Shelly H&T Gen3: Not recorded
Sonoff SNZB-02UL AirGuard E-Ink TH: Not recorded

Temperature Alerts

Shelly H&T Gen3: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
A custom comfort range, one of six presets or edited by hand, pushes a phone notification when the reading leaves the band.

Connectivity

2.4 GHz Wi-Fi

Shelly H&T Gen3: Yes
Catalog note
802.11 b/g/n
Sonoff SNZB-02UL AirGuard E-Ink TH: No

5 GHz Wi-Fi

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Bluetooth

Shelly H&T Gen3: For Pairing
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Other

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Thread

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Z Wave

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Zigbee

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: Zigbee Hub required
Catalog note
Zigbee 3.0 (IEEE 802.15.4) end device. SONOFF lists the ZBBridge-P, ZBBridge-U, Bridge-M, NSPanel Pro and iHost as its own gateways, plus the Aeotec SmartThings Hub V3 and the Zigbee Echo models. Time, date and weather on the screen need a gateway or Home Assistant.

Display

Color Screen

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Date

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
The screen displays the date once the device is connected to a gateway or Home Assistant.

Screen

Shelly H&T Gen3: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
2.9 inch flexible dot-matrix E-Ink panel with a nearly 180 degree viewing angle, readable in bright light. Without a gateway it shows temperature and humidity plus the past 6 hours on a button press.

Screen Resolution

Shelly H&T Gen3: Not recorded
Sonoff SNZB-02UL AirGuard E-Ink TH: Not recorded

Screen Size

Shelly H&T Gen3

Not recorded

Sonoff SNZB-02UL AirGuard E-Ink TH

2.9"

Manufacturer source

The screen measures 2.9 inches.

Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →

Source section: Product description
Model: Sonoff SNZB-02UL AirGuard E-Ink TH
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

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

Screen Type

Shelly H&T Gen3

e-paper

Sonoff SNZB-02UL AirGuard E-Ink TH

E-Ink

Manufacturer source

The screen uses E-Ink.

Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →

Source section: Product description
Model: Sonoff SNZB-02UL AirGuard E-Ink TH
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

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

Time

Shelly H&T Gen3: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
The screen displays the current time once the device is connected to a gateway or Home Assistant.

Touch Screen

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No
Catalog note
A single button on the back handles the 6-hour history recall, the temperature unit switch and pairing.

Weather Forecast

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
Once paired to a SONOFF Zigbee gateway or Home Assistant, the screen shows a weather icon and weather information alongside the reading.

Features

Automations

Shelly H&T Gen3: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
Smart scenes trigger above or below a temperature or humidity threshold, or when the device goes offline, with a false alarm delay. The sensor is a trigger only, never an action.

History Records

Shelly H&T Gen3: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
Six hours of temperature and humidity history on the screen without a gateway, and up to six months of temperature, humidity, dew point and VPD curves in the app or Home Assistant, with CSV export.

Integrations

Alexa

Shelly H&T Gen3: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
SONOFF lists Alexa temperature and humidity queries, and an Echo with a built-in Zigbee hub (Echo Plus 2nd, Echo 4th, Echo Show 2nd) as a compatible gateway.

Apple Home

Shelly H&T Gen3: Yes
Catalog note
Via Matter, from firmware 1.6 onwards.
Sonoff SNZB-02UL AirGuard E-Ink TH: SONOFF Hub required
Catalog note
The device is Zigbee, not HomeKit. SONOFF republishes it into the Apple Home app through its own Matter bridges (Bridge-M, ZBBridge-U, iHost, eWeLink CUBE).

Google Home

Shelly H&T Gen3: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
SONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link.

Home Assistant

Shelly H&T Gen3: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
Zigbee2MQTT works out of the box, while ZHA needs the script SONOFF publishes in its help center for the advanced functions such as the remote sensor display and the weather data.

Matter

Shelly H&T Gen3: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: SONOFF Hub required
Catalog note
Not a Matter device itself: SONOFF bridges it into Matter through the Bridge-M, ZBBridge-U, iHost or eWeLink CUBE.

SmartThings

Shelly H&T Gen3: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
Catalog note
SONOFF lists the Aeotec SmartThings Hub V3 as a compatible Zigbee gateway, with a SmartThings temperature and humidity query.

Power

Battery Life

Shelly H&T Gen3: 1 year
Sonoff SNZB-02UL AirGuard E-Ink TH: 8+ months

Battery Type

Shelly H&T Gen3: 4x AA
Catalog note
USB type-C slot for continuous power
Sonoff SNZB-02UL AirGuard E-Ink TH: 2x AAA

Sensors

Air Quality

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Atmospheric Pressure

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Humidity

Shelly H&T Gen3

Yes

Sonoff SNZB-02UL AirGuard E-Ink TH

Yes

Manufacturer source

The sensor measures relative humidity.

Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →

Source section: Product description
Model: Sonoff SNZB-02UL AirGuard E-Ink TH
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

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

Catalog note

Accuracy of plus or minus 2% RH, refreshed every 5 seconds, with dew point and VPD calculated from the temperature and humidity readings.

Occupancy

Shelly H&T Gen3: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Temperature

Shelly H&T Gen3

Yes

Sonoff SNZB-02UL AirGuard E-Ink TH

Yes

Manufacturer source

The sensor measures air temperature.

Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page →

Source section: Product description
Model: Sonoff SNZB-02UL AirGuard E-Ink TH
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

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

Catalog note

Swiss Sensirion sensor, accuracy of plus or minus 0.2 C (plus or minus 0.4 F), refreshed every 5 seconds. Screen and app resolve to 0.1 C.

Specifications for Shelly H&T Gen3 versus Sonoff SNZB-02UL AirGuard E-Ink TH
Specification	Shelly H&T Gen3	Sonoff SNZB-02UL AirGuard E-Ink TH
Alerts
Air Quality Alerts	No	No
Humidity Alerts	Yes	Yes
Low Battery Alerts	Not recorded	Not recorded
Temperature Alerts	Yes	Yes Catalog note A custom comfort range, one of six presets or edited by hand, pushes a phone notification when the reading leaves the band.
Connectivity
2.4 GHz Wi-Fi	Yes Catalog note 802.11 b/g/n	No
5 GHz Wi-Fi	No	No
Bluetooth	For Pairing	No
Other	No	No
Thread	No	No
Z Wave	No	No
Zigbee	No	Zigbee Hub required Catalog note Zigbee 3.0 (IEEE 802.15.4) end device. SONOFF lists the ZBBridge-P, ZBBridge-U, Bridge-M, NSPanel Pro and iHost as its own gateways, plus the Aeotec SmartThings Hub V3 and the Zigbee Echo models. Time, date and weather on the screen need a gateway or Home Assistant.
Display
Color Screen	No	No
Date	No	Yes Catalog note The screen displays the date once the device is connected to a gateway or Home Assistant.
Screen	Yes	Yes Catalog note 2.9 inch flexible dot-matrix E-Ink panel with a nearly 180 degree viewing angle, readable in bright light. Without a gateway it shows temperature and humidity plus the past 6 hours on a button press.
Screen Resolution	Not recorded	Not recorded
Screen Size	Not recorded	2.9" Manufacturer source The screen measures 2.9 inches. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page → Source section Product description Model Sonoff SNZB-02UL AirGuard E-Ink TH Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant.
Screen Type	e-paper	E-Ink Manufacturer source The screen uses E-Ink. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page → Source section Product description Model Sonoff SNZB-02UL AirGuard E-Ink TH Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant.
Time	Yes	Yes Catalog note The screen displays the current time once the device is connected to a gateway or Home Assistant.
Touch Screen	No	No Catalog note A single button on the back handles the 6-hour history recall, the temperature unit switch and pairing.
Weather Forecast	No	Yes Catalog note Once paired to a SONOFF Zigbee gateway or Home Assistant, the screen shows a weather icon and weather information alongside the reading.
Features
Automations	Yes	Yes Catalog note Smart scenes trigger above or below a temperature or humidity threshold, or when the device goes offline, with a false alarm delay. The sensor is a trigger only, never an action.
History Records	Yes	Yes Catalog note Six hours of temperature and humidity history on the screen without a gateway, and up to six months of temperature, humidity, dew point and VPD curves in the app or Home Assistant, with CSV export.
Integrations
Alexa	Yes	Yes Catalog note SONOFF lists Alexa temperature and humidity queries, and an Echo with a built-in Zigbee hub (Echo Plus 2nd, Echo 4th, Echo Show 2nd) as a compatible gateway.
Apple Home	Yes Catalog note Via Matter, from firmware 1.6 onwards.	SONOFF Hub required Catalog note The device is Zigbee, not HomeKit. SONOFF republishes it into the Apple Home app through its own Matter bridges (Bridge-M, ZBBridge-U, iHost, eWeLink CUBE).
Google Home	Yes	Yes Catalog note SONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link.
Home Assistant	Yes	Yes Catalog note Zigbee2MQTT works out of the box, while ZHA needs the script SONOFF publishes in its help center for the advanced functions such as the remote sensor display and the weather data.
Matter	Yes	SONOFF Hub required Catalog note Not a Matter device itself: SONOFF bridges it into Matter through the Bridge-M, ZBBridge-U, iHost or eWeLink CUBE.
SmartThings	Yes	Yes Catalog note SONOFF lists the Aeotec SmartThings Hub V3 as a compatible Zigbee gateway, with a SmartThings temperature and humidity query.
Power
Battery Life	1 year	8+ months
Battery Type	4x AA Catalog note USB type-C slot for continuous power	2x AAA
Sensors
Air Quality	No	No
Atmospheric Pressure	No	No
Humidity	Yes	Yes Manufacturer source The sensor measures relative humidity. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page → Source section Product description Model Sonoff SNZB-02UL AirGuard E-Ink TH Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Accuracy of plus or minus 2% RH, refreshed every 5 seconds, with dew point and VPD calculated from the temperature and humidity readings.
Occupancy	No	No
Temperature	Yes	Yes Manufacturer source The sensor measures air temperature. Sonoff SNZB-02UL AirGuard E-Ink TH manufacturer product page → Source section Product description Model Sonoff SNZB-02UL AirGuard E-Ink TH Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Swiss Sensirion sensor, accuracy of plus or minus 0.2 C (plus or minus 0.4 F), refreshed every 5 seconds. Screen and app resolve to 0.1 C.

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