The Smart Device Compare comparison

Meross Smart Multi-Function Hygrometer & Thermometer MS120H 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 Meross Smart Multi-Function Hygrometer & Thermometer MS120H 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): Meross Smart Multi-Function Hygrometer & Thermometer MS120H — Yes (Ultra-low-power Bluetooth links the sensor to the Meross Matter Smart Hub (MSH450P); it also connects to a phone over Bluetooth for setup and local readings.); Sonoff SNZB-02UL AirGuard E-Ink TH — No.
Date (display): Meross Smart Multi-Function Hygrometer & Thermometer MS120H — 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.).
Time (display): Meross Smart Multi-Function Hygrometer & Thermometer MS120H — No; Sonoff SNZB-02UL AirGuard E-Ink TH — Yes (The screen displays the current time once the device is connected to a gateway or Home Assistant.).
Weather Forecast (display): Meross Smart Multi-Function Hygrometer & Thermometer MS120H — 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

Zigbee (connectivity): Meross Smart Multi-Function Hygrometer & Thermometer MS120H — 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 Size (display): Meross Smart Multi-Function Hygrometer & Thermometer MS120H — 1.9"; Sonoff SNZB-02UL AirGuard E-Ink TH — 2.9".
Screen Type (display): Meross Smart Multi-Function Hygrometer & Thermometer MS120H — LCD; Sonoff SNZB-02UL AirGuard E-Ink TH — E-Ink.
Alexa (integrations): Meross Smart Multi-Function Hygrometer & Thermometer MS120H — Meross Hub required (Alexa support comes through the Meross Matter Smart Hub, not from the sensor directly.); 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.).

Information still to confirm

2 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 · Meross

Meross Smart Multi-Function Hygrometer & Thermometer MS120H

Catalog update date not recorded

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.

15differences with recorded values for every device

2rows with missing or unspecified information

Consider your setup

Apple Home

Meross Smart Multi-Function Hygrometer & Thermometer MS120HMeross Hub required
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

Home Assistant

Meross Smart Multi-Function Hygrometer & Thermometer MS120HMeross Hub required
Sonoff SNZB-02UL AirGuard E-Ink THYes

Check the integration method, supported model and firmware. A catalog Yes does not establish local control or official support.

Inspect the specifications

Consider your setup

Matter

Meross Smart Multi-Function Hygrometer & Thermometer MS120HMeross Hub required
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H3 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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Humidity Alerts

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Yes
Sonoff SNZB-02UL AirGuard E-Ink TH: Yes

Low Battery Alerts

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Yes
Catalog note
The display carries a low battery indicator.
Sonoff SNZB-02UL AirGuard E-Ink TH: Not recorded

Temperature Alerts

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Yes
Catalog note
A built-in 100dB adjustable buzzer plus app notifications fire when the reading crosses a set condition.
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

5 GHz Wi-Fi

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Bluetooth

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Yes
Catalog note
Ultra-low-power Bluetooth links the sensor to the Meross Matter Smart Hub (MSH450P); it also connects to a phone over Bluetooth for setup and local readings.
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Other

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Thread

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Z Wave

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Zigbee

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: 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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Date

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: 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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Yes
Catalog note
A 1.9 inch display shows the current reading and cycles between the five measured parameters.
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Not recorded
Sonoff SNZB-02UL AirGuard E-Ink TH: Not recorded

Screen Size

Meross Smart Multi-Function Hygrometer & Thermometer MS120H

1.9"

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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H

LCD

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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: No
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: 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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: 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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Yes
Catalog note
Connected to other smart devices through the Meross hub, the readings trigger automations such as turning on a humidifier when humidity drops.
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Yes
Catalog note
Automatic logging keeps up to 120 days of data locally and up to 2 years in the cloud with the Meross hub, viewable and exportable in the app.
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Meross Hub required
Catalog note
Alexa support comes through the Meross Matter Smart Hub, not from the sensor directly.
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Meross Hub required
Catalog note
Meross republishes the sensor into Apple Home through its Matter Smart Hub.
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Meross Hub required
Catalog note
The sensor is not a Matter device itself; it reaches Google Home through the Meross Matter Smart Hub, which republishes it into the ecosystem.
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Meross Hub required
Catalog note
Home Assistant reaches it over Matter through the Meross Matter Smart Hub, or through the community meross_lan integration once Meross adds support.
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Meross Hub required
Catalog note
Not a Matter device itself: the sensor speaks Bluetooth to the Meross Matter Smart Hub (MSH450P), and the hub is what joins Matter. Meross states shipments of the hub and sensors began 2026-09-28.
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: Meross Hub required
Catalog note
Reached through the Meross Matter Smart Hub, which exposes the sensor over Matter.
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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H

3 years

Manufacturer source

Advertised battery life is up to three years.

Meross Smart Multi-Function Hygrometer & Thermometer MS120H manufacturer product page →

Source section: Product description
Model: Meross Smart Multi-Function Hygrometer & Thermometer MS120H
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Requires an MSH450P hub. Battery life varies with settings and use.

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

Catalog note

Meross rates up to 3 years on the single replaceable CR123A battery.

Sonoff SNZB-02UL AirGuard E-Ink TH

8+ months

Battery Type

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: CR123A
Sonoff SNZB-02UL AirGuard E-Ink TH: 2x AAA

Sensors

Air Quality

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Atmospheric Pressure

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Humidity

Meross Smart Multi-Function Hygrometer & Thermometer MS120H

Yes

Manufacturer source

The sensor measures relative humidity.

Meross Smart Multi-Function Hygrometer & Thermometer MS120H manufacturer product page →

Source section: Product description
Model: Meross Smart Multi-Function Hygrometer & Thermometer MS120H
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Requires an MSH450P hub. Battery life varies with settings and use.

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

Catalog note

Humidity accuracy up to plus or minus 2% RH, with dew point, absolute humidity and vapor pressure deficit derived from the readings.

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

Meross Smart Multi-Function Hygrometer & Thermometer MS120H: No
Sonoff SNZB-02UL AirGuard E-Ink TH: No

Temperature

Meross Smart Multi-Function Hygrometer & Thermometer MS120H

Yes

Manufacturer source

The sensor measures temperature.

Meross Smart Multi-Function Hygrometer & Thermometer MS120H manufacturer product page →

Source section: Product description
Model: Meross Smart Multi-Function Hygrometer & Thermometer MS120H
Region: Manufacturer product page; no universal regional compatibility implied
Firmware: Not specified by this source
Checked: 2026-10-04

Requires an MSH450P hub. Battery life varies with settings and use.

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

Catalog note

Temperature accuracy up to plus or minus 0.2 C (plus or minus 0.36 F).

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 Meross Smart Multi-Function Hygrometer & Thermometer MS120H versus Sonoff SNZB-02UL AirGuard E-Ink TH
Specification	Meross Smart Multi-Function Hygrometer & Thermometer MS120H	Sonoff SNZB-02UL AirGuard E-Ink TH
Alerts
Air Quality Alerts	No	No
Humidity Alerts	Yes	Yes
Low Battery Alerts	Yes Catalog note The display carries a low battery indicator.	Not recorded
Temperature Alerts	Yes Catalog note A built-in 100dB adjustable buzzer plus app notifications fire when the reading crosses a set condition.	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 Catalog note Ultra-low-power Bluetooth links the sensor to the Meross Matter Smart Hub (MSH450P); it also connects to a phone over Bluetooth for setup and local readings.	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 Catalog note A 1.9 inch display shows the current reading and cycles between the five measured parameters.	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	1.9"	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	LCD	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	No	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 Catalog note Connected to other smart devices through the Meross hub, the readings trigger automations such as turning on a humidifier when humidity drops.	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 Catalog note Automatic logging keeps up to 120 days of data locally and up to 2 years in the cloud with the Meross hub, viewable and exportable in the app.	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	Meross Hub required Catalog note Alexa support comes through the Meross Matter Smart Hub, not from the sensor directly.	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	Meross Hub required Catalog note Meross republishes the sensor into Apple Home through its Matter Smart Hub.	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	Meross Hub required Catalog note The sensor is not a Matter device itself; it reaches Google Home through the Meross Matter Smart Hub, which republishes it into the ecosystem.	Yes Catalog note SONOFF lists a Google Home temperature and humidity voice query, reached through the eWeLink cloud-to-cloud link.
Home Assistant	Meross Hub required Catalog note Home Assistant reaches it over Matter through the Meross Matter Smart Hub, or through the community meross_lan integration once Meross adds support.	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	Meross Hub required Catalog note Not a Matter device itself: the sensor speaks Bluetooth to the Meross Matter Smart Hub (MSH450P), and the hub is what joins Matter. Meross states shipments of the hub and sensors began 2026-09-28.	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	Meross Hub required Catalog note Reached through the Meross Matter Smart Hub, which exposes the sensor over Matter.	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 Advertised battery life is up to three years. Meross Smart Multi-Function Hygrometer & Thermometer MS120H manufacturer product page → Source section Product description Model Meross Smart Multi-Function Hygrometer & Thermometer MS120H Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Requires an MSH450P hub. Battery life varies with settings and use. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Meross rates up to 3 years on the single replaceable CR123A battery.	8+ months
Battery Type	CR123A	2x AAA
Sensors
Air Quality	No	No
Atmospheric Pressure	No	No
Humidity	Yes Manufacturer source The sensor measures relative humidity. Meross Smart Multi-Function Hygrometer & Thermometer MS120H manufacturer product page → Source section Product description Model Meross Smart Multi-Function Hygrometer & Thermometer MS120H Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Requires an MSH450P hub. Battery life varies with settings and use. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Humidity accuracy up to plus or minus 2% RH, with dew point, absolute humidity and vapor pressure deficit derived from the readings.	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 Manufacturer source The sensor measures temperature. Meross Smart Multi-Function Hygrometer & Thermometer MS120H manufacturer product page → Source section Product description Model Meross Smart Multi-Function Hygrometer & Thermometer MS120H Region Manufacturer product page; no universal regional compatibility implied Firmware Not specified by this source Checked 2026-10-04 Requires an MSH450P hub. Battery life varies with settings and use. Document check only; not a hands-on test or verification of every regional or firmware variant. Catalog note Temperature accuracy up to plus or minus 0.2 C (plus or minus 0.36 F).	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