The Smart Device Compare comparison

Shelly BLU H&T ZB 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 BLU H&T ZB 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

Bluetooth (connectivity): Shelly BLU H&T ZB — Yes (Bluetooth 5 (LE) on 2402 to 2480 MHz with under 8 dBm of RF power, the radio a Shelly Bluetooth gateway reads the sensor through.); Sonoff SNZB-02UL AirGuard E-Ink TH — No.
Screen (display): Shelly BLU H&T ZB — No (This is the display-less model: its only output is a single red LED, and readings are delivered over Bluetooth or Zigbee. The sibling Shelly BLU H&T Display ZB (SBHT-103C) is the e-paper version.); Sonoff SNZB-02UL AirGuard E-Ink TH — Yes (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.).

Specifications to check side by side

Alexa (integrations): Shelly BLU H&T ZB — Shelly gateway required (Reached through the Shelly Smart Control account, which the product page lists alongside Google Home, Home Assistant and Samsung SmartThings, and which needs a gateway on the network for this sensor: the Shelly BLU Gateway, or any Shelly Plus, Pro, Gen3 or Gen4 device other than a sensor.); Sonoff SNZB-02UL AirGuard E-Ink TH — Yes (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 (integrations): Shelly BLU H&T ZB — No (The device documentation lists only Bluetooth 5 LE and Zigbee 802.15.4 with no Matter or HomeKit profile, and the platforms Shelly names for it are Alexa, Google Home, Home Assistant and Samsung SmartThings.); 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).).
Google Home (integrations): Shelly BLU H&T ZB — Shelly gateway required (Reached through the Shelly Smart Control account, which the product page lists alongside Alexa, Home Assistant and Samsung SmartThings, and which needs a gateway on the network for this sensor: the Shelly BLU Gateway, or any Shelly Plus, Pro, Gen3 or Gen4 device other than a sensor.); Sonoff SNZB-02UL AirGuard E-Ink TH — Yes (SONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link.).
Matter (integrations): Shelly BLU H&T ZB — No (The device documentation lists only Bluetooth 5 (LE) and Zigbee 802.15.4 as its radios, with no Matter profile. The FAQ on the product page presents Matter as a Gen3 and Gen4 feature, and this is a BLU battery sensor.); Sonoff SNZB-02UL AirGuard E-Ink TH — SONOFF Hub required (Not a Matter device itself: SONOFF bridges it into Matter through the Bridge-M, ZBBridge-U, iHost or eWeLink CUBE.).

Information still to confirm

10 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 BLU H&T ZB

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.

9differences with recorded values for every device

10rows with missing or unspecified information

Consider your setup

Apple Home

Shelly BLU H&T ZBNo
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 BLU H&T ZBNo
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 BLU H&T ZB3 years
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 BLU H&T ZB: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Humidity Alerts

Shelly BLU H&T ZB: Yes
Catalog note
Shelly documents alerts and notifications when humidity crosses predefined thresholds, used for cases such as stopping mold and mildew in basements and bathrooms.
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes

Low Battery Alerts

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

Temperature Alerts

Shelly BLU H&T ZB: Yes
Catalog note
Shelly documents alerts and notifications when temperature crosses predefined thresholds, used for cases such as preventing frozen pipes in cold weather.
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 BLU H&T ZB: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

5 GHz Wi-Fi

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

Bluetooth

Shelly BLU H&T ZB

Yes

Manufacturer source

Bluetooth 5 LE is specified.

Shelly BLU H&T ZB manufacturer product page →

Source section: Technical details: specifications
Model: Shelly BLU H&T ZB
Region: US manufacturer storefront; check the exact regional hardware variant
Firmware: Not specified by this source
Checked: 2026-10-04

Battery life is a manufacturer estimate and depends on use.

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

Catalog note

Bluetooth 5 (LE) on 2402 to 2480 MHz with under 8 dBm of RF power, the radio a Shelly Bluetooth gateway reads the sensor through.

Sonoff SNZB-02UL AirGuard E-Ink TH

Other

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

Thread

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

Z Wave

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

Zigbee

Shelly BLU H&T ZB: Zigbee Hub required
Catalog note
Zigbee end device on 802.15.4, 2405 to 2480 MHz, so it joins an existing Zigbee coordinator rather than hosting a network. Five quick presses of the button start Zigbee pairing.
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 BLU H&T ZB: Not applicable / unspecified
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Date

Shelly BLU H&T ZB: Not applicable / unspecified
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 BLU H&T ZB: No
Catalog note
This is the display-less model: its only output is a single red LED, and readings are delivered over Bluetooth or Zigbee. The sibling Shelly BLU H&T Display ZB (SBHT-103C) is the e-paper version.
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 BLU H&T ZB: Not applicable / unspecified
Sonoff SNZB-02UL AirGuard E-Ink TH: Not recorded

Screen Size

Shelly BLU H&T ZB

Not applicable / unspecified

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 BLU H&T ZB

Not applicable / unspecified

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 BLU H&T ZB: Not applicable / unspecified
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 BLU H&T ZB: Not applicable / unspecified
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 BLU H&T ZB: Not applicable / unspecified
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 BLU H&T ZB: Yes
Catalog note
Scene activation: the readings trigger scenes with other Shelly devices, the documented example being a Shelly Plus 1 wired to a bathroom fan that runs when humidity climbs.
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 BLU H&T ZB: Not recorded
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 BLU H&T ZB: Shelly gateway required
Catalog note
Reached through the Shelly Smart Control account, which the product page lists alongside Google Home, Home Assistant and Samsung SmartThings, and which needs a gateway on the network for this sensor: the Shelly BLU Gateway, or any Shelly Plus, Pro, Gen3 or Gen4 device other than a sensor.
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 BLU H&T ZB: No
Catalog note
The device documentation lists only Bluetooth 5 LE and Zigbee 802.15.4 with no Matter or HomeKit profile, and the platforms Shelly names for it are Alexa, Google Home, Home Assistant and Samsung SmartThings.
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 BLU H&T ZB: Shelly gateway required
Catalog note
Reached through the Shelly Smart Control account, which the product page lists alongside Alexa, Home Assistant and Samsung SmartThings, and which needs a gateway on the network for this sensor: the Shelly BLU Gateway, or any Shelly Plus, Pro, Gen3 or Gen4 device other than a sensor.
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 BLU H&T ZB: Yes
Catalog note
Zigbee2MQTT supports this exact model (SBHT-203C), exposing battery, temperature, humidity and identify, so it appears in Home Assistant as soon as it joins the Zigbee network.
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 BLU H&T ZB: No
Catalog note
The device documentation lists only Bluetooth 5 (LE) and Zigbee 802.15.4 as its radios, with no Matter profile. The FAQ on the product page presents Matter as a Gen3 and Gen4 feature, and this is a BLU battery sensor.
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 BLU H&T ZB: Shelly gateway required
Catalog note
Reached through the Shelly Smart Control account, which the product page lists alongside Alexa, Google Home and Home Assistant, and which needs a gateway on the network for this sensor: the Shelly BLU Gateway, or any Shelly Plus, Pro, Gen3 or Gen4 device other than a sensor.
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 BLU H&T ZB

3 years

Manufacturer source

The stated battery life is up to three years.

Shelly BLU H&T ZB manufacturer product page →

Source section: Technical details: specifications
Model: Shelly BLU H&T ZB
Region: US manufacturer storefront; check the exact regional hardware variant
Firmware: Not specified by this source
Checked: 2026-10-04

Battery life is a manufacturer estimate and depends on use.

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

Sonoff SNZB-02UL AirGuard E-Ink TH

8+ months

Battery Type

Shelly BLU H&T ZB

1x CR2032

Manufacturer source

Power comes from one CR2032 battery.

Shelly BLU H&T ZB manufacturer product page →

Source section: Technical details: specifications
Model: Shelly BLU H&T ZB
Region: US manufacturer storefront; check the exact regional hardware variant
Firmware: Not specified by this source
Checked: 2026-10-04

Battery life is a manufacturer estimate and depends on use.

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

Sonoff SNZB-02UL AirGuard E-Ink TH

2x AAA

Sensors

Air Quality

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

Atmospheric Pressure

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

Humidity

Shelly BLU H&T ZB

Yes

Manufacturer source

A relative humidity sensor is included.

Shelly BLU H&T ZB manufacturer product page →

Source section: Technical details: specifications
Model: Shelly BLU H&T ZB
Region: US manufacturer storefront; check the exact regional hardware variant
Firmware: Not specified by this source
Checked: 2026-10-04

Battery life is a manufacturer estimate and depends on use.

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

Catalog note

Measures relative humidity across the full 0 to 100% RH range.

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 BLU H&T ZB: No
Catalog note
The specification lists a humidity sensor and a temperature sensor only. Unlike the Display ZB version, there is not even a light sensor on board.
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Temperature

Shelly BLU H&T ZB

Yes

Manufacturer source

An air temperature sensor is included.

Shelly BLU H&T ZB manufacturer product page →

Source section: Technical details: specifications
Model: Shelly BLU H&T ZB
Region: US manufacturer storefront; check the exact regional hardware variant
Firmware: Not specified by this source
Checked: 2026-10-04

Battery life is a manufacturer estimate and depends on use.

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

Catalog note

Measures ambient air temperature continuously and reports it over BLE advertising and Zigbee, with a rated ambient range of -20 to 60 degrees Celsius.

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 BLU H&T ZB versus Sonoff SNZB-02UL AirGuard E-Ink TH
Specification	Shelly BLU H&T ZB	Sonoff SNZB-02UL AirGuard E-Ink TH
Alerts
Air Quality Alerts	No	No
Humidity Alerts	Yes Catalog note Shelly documents alerts and notifications when humidity crosses predefined thresholds, used for cases such as stopping mold and mildew in basements and bathrooms.	Yes
Low Battery Alerts	Not recorded	Not recorded
Temperature Alerts	Yes Catalog note Shelly documents alerts and notifications when temperature crosses predefined thresholds, used for cases such as preventing frozen pipes in cold weather.	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	No	No
5 GHz Wi-Fi	No	No
Bluetooth	Yes Manufacturer source Bluetooth 5 LE is specified. Shelly BLU H&T ZB manufacturer product page → Source section Technical details: specifications Model Shelly BLU H&T ZB Region US manufacturer storefront; check the exact regional hardware variant Firmware Not specified by this source Checked 2026-10-04 Battery life is a manufacturer estimate and depends on use. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Bluetooth 5 (LE) on 2402 to 2480 MHz with under 8 dBm of RF power, the radio a Shelly Bluetooth gateway reads the sensor through.	No
Other	No	No
Thread	No	No
Z Wave	No	No
Zigbee	Zigbee Hub required Catalog note Zigbee end device on 802.15.4, 2405 to 2480 MHz, so it joins an existing Zigbee coordinator rather than hosting a network. Five quick presses of the button start Zigbee pairing.	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	Not applicable / unspecified	No
Date	Not applicable / unspecified	Yes Catalog note The screen displays the date once the device is connected to a gateway or Home Assistant.
Screen	No Catalog note This is the display-less model: its only output is a single red LED, and readings are delivered over Bluetooth or Zigbee. The sibling Shelly BLU H&T Display ZB (SBHT-103C) is the e-paper version.	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 applicable / unspecified	Not recorded
Screen Size	Not applicable / unspecified	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	Not applicable / unspecified	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	Not applicable / unspecified	Yes Catalog note The screen displays the current time once the device is connected to a gateway or Home Assistant.
Touch Screen	Not applicable / unspecified	No Catalog note A single button on the back handles the 6-hour history recall, the temperature unit switch and pairing.
Weather Forecast	Not applicable / unspecified	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 Catalog note Scene activation: the readings trigger scenes with other Shelly devices, the documented example being a Shelly Plus 1 wired to a bathroom fan that runs when humidity climbs.	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	Not recorded	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 gateway required Catalog note Reached through the Shelly Smart Control account, which the product page lists alongside Google Home, Home Assistant and Samsung SmartThings, and which needs a gateway on the network for this sensor: the Shelly BLU Gateway, or any Shelly Plus, Pro, Gen3 or Gen4 device other than a sensor.	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	No Catalog note The device documentation lists only Bluetooth 5 LE and Zigbee 802.15.4 with no Matter or HomeKit profile, and the platforms Shelly names for it are Alexa, Google Home, Home Assistant and Samsung SmartThings.	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 gateway required Catalog note Reached through the Shelly Smart Control account, which the product page lists alongside Alexa, Home Assistant and Samsung SmartThings, and which needs a gateway on the network for this sensor: the Shelly BLU Gateway, or any Shelly Plus, Pro, Gen3 or Gen4 device other than a sensor.	Yes Catalog note SONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link.
Home Assistant	Yes Catalog note Zigbee2MQTT supports this exact model (SBHT-203C), exposing battery, temperature, humidity and identify, so it appears in Home Assistant as soon as it joins the Zigbee network.	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	No Catalog note The device documentation lists only Bluetooth 5 (LE) and Zigbee 802.15.4 as its radios, with no Matter profile. The FAQ on the product page presents Matter as a Gen3 and Gen4 feature, and this is a BLU battery sensor.	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 gateway required Catalog note Reached through the Shelly Smart Control account, which the product page lists alongside Alexa, Google Home and Home Assistant, and which needs a gateway on the network for this sensor: the Shelly BLU Gateway, or any Shelly Plus, Pro, Gen3 or Gen4 device other than a sensor.	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	3 years Manufacturer source The stated battery life is up to three years. Shelly BLU H&T ZB manufacturer product page → Source section Technical details: specifications Model Shelly BLU H&T ZB Region US manufacturer storefront; check the exact regional hardware variant Firmware Not specified by this source Checked 2026-10-04 Battery life is a manufacturer estimate and depends on use. Document check only; not a hands-on test or verification of every regional or firmware variant.	8+ months
Battery Type	1x CR2032 Manufacturer source Power comes from one CR2032 battery. Shelly BLU H&T ZB manufacturer product page → Source section Technical details: specifications Model Shelly BLU H&T ZB Region US manufacturer storefront; check the exact regional hardware variant Firmware Not specified by this source Checked 2026-10-04 Battery life is a manufacturer estimate and depends on use. Document check only; not a hands-on test or verification of every regional or firmware variant.	2x AAA
Sensors
Air Quality	No	No
Atmospheric Pressure	No	No
Humidity	Yes Manufacturer source A relative humidity sensor is included. Shelly BLU H&T ZB manufacturer product page → Source section Technical details: specifications Model Shelly BLU H&T ZB Region US manufacturer storefront; check the exact regional hardware variant Firmware Not specified by this source Checked 2026-10-04 Battery life is a manufacturer estimate and depends on use. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Measures relative humidity across the full 0 to 100% RH range.	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 Catalog note The specification lists a humidity sensor and a temperature sensor only. Unlike the Display ZB version, there is not even a light sensor on board.	No
Temperature	Yes Manufacturer source An air temperature sensor is included. Shelly BLU H&T ZB manufacturer product page → Source section Technical details: specifications Model Shelly BLU H&T ZB Region US manufacturer storefront; check the exact regional hardware variant Firmware Not specified by this source Checked 2026-10-04 Battery life is a manufacturer estimate and depends on use. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Measures ambient air temperature continuously and reports it over BLE advertising and Zigbee, with a rated ambient range of -20 to 60 degrees Celsius.	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