The Smart Device Compare comparison

Sonoff SNZB-02UL AirGuard E-Ink TH vs SwitchBot Indoor/Outdoor Thermo-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 SwitchBot Indoor/Outdoor Thermo-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

Bluetooth (connectivity): Sonoff SNZB-02UL AirGuard E-Ink TH — No; SwitchBot Indoor/Outdoor Thermo-Hygrometer — Yes (Bluetooth 4.2, works standalone with the app; a SwitchBot Hub is only needed for remote access and cloud storage).
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.); SwitchBot Indoor/Outdoor Thermo-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.); SwitchBot Indoor/Outdoor Thermo-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).); SwitchBot Indoor/Outdoor Thermo-Hygrometer — Yes (Via Matter.).
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.); SwitchBot Indoor/Outdoor Thermo-Hygrometer — Yes.
Battery Life (power): Sonoff SNZB-02UL AirGuard E-Ink TH — 8+ months; SwitchBot Indoor/Outdoor Thermo-Hygrometer — 2 years.

Information still to confirm

9 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 · SwitchBot

SwitchBot Indoor/Outdoor Thermo-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.

6differences with recorded values for every device

9rows with missing or unspecified information

Consider your setup

Apple Home

Sonoff SNZB-02UL AirGuard E-Ink THSONOFF Hub required
SwitchBot Indoor/Outdoor Thermo-HygrometerYes

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
SwitchBot Indoor/Outdoor Thermo-HygrometerYes

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
SwitchBot Indoor/Outdoor Thermo-Hygrometer2 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
SwitchBot Indoor/Outdoor Thermo-Hygrometer: No

Humidity Alerts

Sonoff SNZB-02UL AirGuard E-Ink TH: Yes
SwitchBot Indoor/Outdoor Thermo-Hygrometer: Yes

Low Battery Alerts

Sonoff SNZB-02UL AirGuard E-Ink TH: Not recorded
SwitchBot Indoor/Outdoor Thermo-Hygrometer: Yes

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.
SwitchBot Indoor/Outdoor Thermo-Hygrometer: Yes

Connectivity

2.4 GHz Wi-Fi

Sonoff SNZB-02UL AirGuard E-Ink TH: No
SwitchBot Indoor/Outdoor Thermo-Hygrometer: No

5 GHz Wi-Fi

Sonoff SNZB-02UL AirGuard E-Ink TH: No
SwitchBot Indoor/Outdoor Thermo-Hygrometer: No

Bluetooth

Sonoff SNZB-02UL AirGuard E-Ink TH: No
SwitchBot Indoor/Outdoor Thermo-Hygrometer: Yes
Catalog note
Bluetooth 4.2, works standalone with the app; a SwitchBot Hub is only needed for remote access and cloud storage

Other

Sonoff SNZB-02UL AirGuard E-Ink TH: No
SwitchBot Indoor/Outdoor Thermo-Hygrometer: No

Thread

Sonoff SNZB-02UL AirGuard E-Ink TH: No
SwitchBot Indoor/Outdoor Thermo-Hygrometer: No

Z Wave

Sonoff SNZB-02UL AirGuard E-Ink TH: No
SwitchBot Indoor/Outdoor Thermo-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.
SwitchBot Indoor/Outdoor Thermo-Hygrometer: No

Display

Color Screen

Sonoff SNZB-02UL AirGuard E-Ink TH: No
SwitchBot Indoor/Outdoor Thermo-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.
SwitchBot Indoor/Outdoor Thermo-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.
SwitchBot Indoor/Outdoor Thermo-Hygrometer: No

Screen Resolution

Sonoff SNZB-02UL AirGuard E-Ink TH: Not recorded
SwitchBot Indoor/Outdoor Thermo-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.

SwitchBot Indoor/Outdoor Thermo-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.

SwitchBot Indoor/Outdoor Thermo-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.
SwitchBot Indoor/Outdoor Thermo-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.
SwitchBot Indoor/Outdoor Thermo-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.
SwitchBot Indoor/Outdoor Thermo-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.
SwitchBot Indoor/Outdoor Thermo-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.
SwitchBot Indoor/Outdoor Thermo-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.
SwitchBot Indoor/Outdoor Thermo-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).
SwitchBot Indoor/Outdoor Thermo-Hygrometer: Yes
Catalog note
Via Matter.

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.
SwitchBot Indoor/Outdoor Thermo-Hygrometer: Yes

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.
SwitchBot Indoor/Outdoor Thermo-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.
SwitchBot Indoor/Outdoor Thermo-Hygrometer: Yes

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.
SwitchBot Indoor/Outdoor Thermo-Hygrometer: Yes

Power

Battery Life

Sonoff SNZB-02UL AirGuard E-Ink TH: 8+ months
SwitchBot Indoor/Outdoor Thermo-Hygrometer: 2 years

Battery Type

Sonoff SNZB-02UL AirGuard E-Ink TH: 2x AAA
SwitchBot Indoor/Outdoor Thermo-Hygrometer: 2x AAA

Sensors

Air Quality

Sonoff SNZB-02UL AirGuard E-Ink TH: No
SwitchBot Indoor/Outdoor Thermo-Hygrometer: No

Atmospheric Pressure

Sonoff SNZB-02UL AirGuard E-Ink TH: No
SwitchBot Indoor/Outdoor Thermo-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.

SwitchBot Indoor/Outdoor Thermo-Hygrometer

Yes

Occupancy

Sonoff SNZB-02UL AirGuard E-Ink TH: No
SwitchBot Indoor/Outdoor Thermo-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.

SwitchBot Indoor/Outdoor Thermo-Hygrometer

Yes

Specifications for Sonoff SNZB-02UL AirGuard E-Ink TH versus SwitchBot Indoor/Outdoor Thermo-Hygrometer
Specification	Sonoff SNZB-02UL AirGuard E-Ink TH	SwitchBot Indoor/Outdoor Thermo-Hygrometer
Alerts
Air Quality Alerts	No	No
Humidity Alerts	Yes	Yes
Low Battery Alerts	Not recorded	Yes
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
Connectivity
2.4 GHz Wi-Fi	No	No
5 GHz Wi-Fi	No	No
Bluetooth	No	Yes Catalog note Bluetooth 4.2, works standalone with the app; a SwitchBot Hub is only needed for remote access and cloud storage
Other	No	No
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).	Yes Catalog note Via Matter.
Google Home	Yes Catalog note SONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link.	Yes
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.	Yes
SmartThings	Yes Catalog note SONOFF lists the Aeotec SmartThings Hub V3 as a compatible Zigbee gateway, with a SmartThings temperature and humidity query.	Yes
Power
Battery Life	8+ months	2 years
Battery Type	2x AAA	2x AAA
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

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