The Smart Device Compare comparison

Sonoff SNZB-02UL AirGuard E-Ink TH vs YoLink Smart Wireless Thermometer Hygrometer

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Sonoff SNZB-02UL AirGuard E-Ink TH and YoLink Smart Wireless Thermometer Hygrometer

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

Other (connectivity): Sonoff SNZB-02UL AirGuard E-Ink TH — No; YoLink Smart Wireless Thermometer Hygrometer — Yes (LoRa, up to 1/4 mile range (YoLink hub required)).
Screen (display): 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.); YoLink Smart Wireless Thermometer Hygrometer — No.

Specifications to check side by side

Zigbee (connectivity): 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.); YoLink Smart Wireless Thermometer Hygrometer — No.
Apple Home (integrations): 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).); YoLink Smart Wireless Thermometer Hygrometer — YoLink Local Hub required (The YoLink Local Hub bridges YoLink devices to Matter, which is how they reach the Apple Home app. The older cloud-only YoLink hubs have no Apple Home path.).
Matter (integrations): 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.); YoLink Smart Wireless Thermometer Hygrometer — YoLink Local Hub required.
SmartThings (integrations): Sonoff SNZB-02UL AirGuard E-Ink TH — Yes (SONOFF lists the Aeotec SmartThings Hub V3 as a compatible Zigbee gateway, with a SmartThings temperature and humidity query.); YoLink Smart Wireless Thermometer Hygrometer — YoLink Local Hub required (Via Matter).

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 · Sonoff

Sonoff SNZB-02UL AirGuard E-Ink TH

Last updated October 2026

View full device profile

Option 2 · YoLink

YoLink Smart Wireless Thermometer Hygrometer

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.

8differences with recorded values for every device

10rows with missing or unspecified information

Consider your setup

Apple Home

Sonoff SNZB-02UL AirGuard E-Ink THSONOFF Hub required
YoLink Smart Wireless Thermometer HygrometerYoLink Local 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

Sonoff SNZB-02UL AirGuard E-Ink THSONOFF Hub required
YoLink Smart Wireless Thermometer HygrometerYoLink Local 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

Sonoff SNZB-02UL AirGuard E-Ink TH8+ months
YoLink Smart Wireless Thermometer Hygrometer5 years

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

Sonoff SNZB-02UL AirGuard E-Ink TH: No
YoLink Smart Wireless Thermometer Hygrometer: No

Humidity Alerts

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
YoLink Smart Wireless Thermometer Hygrometer: Yes

Low Battery Alerts

Sonoff SNZB-02UL AirGuard E-Ink TH: Not recorded
YoLink Smart Wireless Thermometer Hygrometer: Yes
Catalog note
Real-time low battery alerts in the YoLink app

Temperature Alerts

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.
YoLink Smart Wireless Thermometer Hygrometer: Yes
Catalog note
App, email and text/SMS alerts

Connectivity

2.4 GHz Wi-Fi

Sonoff SNZB-02UL AirGuard E-Ink TH: No
YoLink Smart Wireless Thermometer Hygrometer: No

5 GHz Wi-Fi

Sonoff SNZB-02UL AirGuard E-Ink TH: No
YoLink Smart Wireless Thermometer Hygrometer: No

Bluetooth

Sonoff SNZB-02UL AirGuard E-Ink TH: No
YoLink Smart Wireless Thermometer Hygrometer: No

Other

Sonoff SNZB-02UL AirGuard E-Ink TH: No
YoLink Smart Wireless Thermometer Hygrometer: Yes
Catalog note
LoRa, up to 1/4 mile range (YoLink hub required)

Thread

Sonoff SNZB-02UL AirGuard E-Ink TH: No
YoLink Smart Wireless Thermometer Hygrometer: No

Z Wave

Sonoff SNZB-02UL AirGuard E-Ink TH: No
YoLink Smart Wireless Thermometer Hygrometer: No

Zigbee

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.
YoLink Smart Wireless Thermometer Hygrometer: No

Display

Color Screen

Sonoff SNZB-02UL AirGuard E-Ink TH: No
YoLink Smart Wireless Thermometer Hygrometer: Not applicable / unspecified

Date

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.
YoLink Smart Wireless Thermometer Hygrometer: Not applicable / unspecified

Screen

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.
YoLink Smart Wireless Thermometer Hygrometer: No

Screen Resolution

Sonoff SNZB-02UL AirGuard E-Ink TH: Not recorded
YoLink Smart Wireless Thermometer Hygrometer: Not applicable / unspecified

Screen Size

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.

YoLink Smart Wireless Thermometer Hygrometer

Not applicable / unspecified

Screen Type

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.

YoLink Smart Wireless Thermometer Hygrometer

Not applicable / unspecified

Time

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.
YoLink Smart Wireless Thermometer Hygrometer: Not applicable / unspecified

Touch Screen

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.
YoLink Smart Wireless Thermometer Hygrometer: Not applicable / unspecified

Weather Forecast

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.
YoLink Smart Wireless Thermometer Hygrometer: Not applicable / unspecified

Features

Automations

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.
YoLink Smart Wireless Thermometer Hygrometer: Yes

History Records

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.
YoLink Smart Wireless Thermometer Hygrometer: Yes

Integrations

Alexa

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.
YoLink Smart Wireless Thermometer Hygrometer: Yes

Apple Home

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).
YoLink Smart Wireless Thermometer Hygrometer: YoLink Local Hub required
Catalog note
The YoLink Local Hub bridges YoLink devices to Matter, which is how they reach the Apple Home app. The older cloud-only YoLink hubs have no Apple Home path.

Google Home

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.
YoLink Smart Wireless Thermometer Hygrometer: Not recorded

Home Assistant

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.
YoLink Smart Wireless Thermometer Hygrometer: Yes

Matter

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.
YoLink Smart Wireless Thermometer Hygrometer: YoLink Local Hub required

SmartThings

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.
YoLink Smart Wireless Thermometer Hygrometer: YoLink Local Hub required
Catalog note
Via Matter

Power

Battery Life

Sonoff SNZB-02UL AirGuard E-Ink TH: 8+ months
YoLink Smart Wireless Thermometer Hygrometer: 5 years

Battery Type

Sonoff SNZB-02UL AirGuard E-Ink TH: 2x AAA
YoLink Smart Wireless Thermometer Hygrometer: 2x AA

Sensors

Air Quality

Sonoff SNZB-02UL AirGuard E-Ink TH: No
YoLink Smart Wireless Thermometer Hygrometer: No

Atmospheric Pressure

Sonoff SNZB-02UL AirGuard E-Ink TH: No
YoLink Smart Wireless Thermometer Hygrometer: No

Humidity

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.

YoLink Smart Wireless Thermometer Hygrometer

Yes

Occupancy

Sonoff SNZB-02UL AirGuard E-Ink TH: No
YoLink Smart Wireless Thermometer Hygrometer: No

Temperature

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.

YoLink Smart Wireless Thermometer Hygrometer

Yes

Catalog note

Wide temperature range

Specifications for Sonoff SNZB-02UL AirGuard E-Ink TH versus YoLink Smart Wireless Thermometer Hygrometer
Specification	Sonoff SNZB-02UL AirGuard E-Ink TH	YoLink Smart Wireless Thermometer Hygrometer
Alerts
Air Quality Alerts	No	No
Humidity Alerts	Yes	Yes
Low Battery Alerts	Not recorded	Yes Catalog note Real-time low battery alerts in the YoLink app
Temperature Alerts	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.	Yes Catalog note App, email and text/SMS alerts
Connectivity
2.4 GHz Wi-Fi	No	No
5 GHz Wi-Fi	No	No
Bluetooth	No	No
Other	No	Yes Catalog note LoRa, up to 1/4 mile range (YoLink hub required)
Thread	No	No
Z Wave	No	No
Zigbee	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.	No
Display
Color Screen	No	Not applicable / unspecified
Date	Yes Catalog note The screen displays the date once the device is connected to a gateway or Home Assistant.	Not applicable / unspecified
Screen	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.	No
Screen Resolution	Not recorded	Not applicable / unspecified
Screen Size	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.	Not applicable / unspecified
Screen Type	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.	Not applicable / unspecified
Time	Yes Catalog note The screen displays the current time once the device is connected to a gateway or Home Assistant.	Not applicable / unspecified
Touch Screen	No Catalog note A single button on the back handles the 6-hour history recall, the temperature unit switch and pairing.	Not applicable / unspecified
Weather Forecast	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.	Not applicable / unspecified
Features
Automations	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.	Yes
History Records	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.	Yes
Integrations
Alexa	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.	Yes
Apple Home	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).	YoLink Local Hub required Catalog note The YoLink Local Hub bridges YoLink devices to Matter, which is how they reach the Apple Home app. The older cloud-only YoLink hubs have no Apple Home path.
Google Home	Yes Catalog note SONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link.	Not recorded
Home Assistant	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.	Yes
Matter	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.	YoLink Local Hub required
SmartThings	Yes Catalog note SONOFF lists the Aeotec SmartThings Hub V3 as a compatible Zigbee gateway, with a SmartThings temperature and humidity query.	YoLink Local Hub required Catalog note Via Matter
Power
Battery Life	8+ months	5 years
Battery Type	2x AAA	2x AA
Sensors
Air Quality	No	No
Atmospheric Pressure	No	No
Humidity	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.	Yes
Occupancy	No	No
Temperature	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.	Yes Catalog note Wide temperature range

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