# SONOFF SNZB-02B

*SONOFF / SNZB-02B*

> The SNZB-02B (AirGuard TH Lite) needs a Zigbee 3.0 hub or coordinator. It is a small temperature and humidity sensor on two AAA batteries that also works out dew point and VPD in the app. It suits HomeKit users through an integration (a Matter bridge). Home Assistant users reach it through an integration (Zigbee).

- Canonical page: https://smarthomecanon.com/devices/sonoff-snzb-02b
- Last checked: 2026-10-13

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [SONOFF](https://smarthomecanon.com/brands/sonoff) |
| Category | Temperature and humidity sensor |
| Model numbers | SNZB-02B |
| Status | Current[^1] |
| Type | Temperature and humidity[^1] |
| Power | 2 x AAA batteries[^1] |
| Radio | Zigbee 3.0[^1] |
| In Zigbee2MQTT docs | Yes[^2] |

## Integration paths

**How the SONOFF SNZB-02B connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Matter via Bridge](https://smarthomecanon.com/protocols/matter-bridged) | A SONOFF Matter bridge, such as the Zigbee Bridge Ultra[^3] | unknown | unknown |
| [Zigbee](https://smarthomecanon.com/protocols/zigbee) | A Zigbee 3.0 hub or coordinator[^1] | unknown | unknown |

**Platform support for the SONOFF SNZB-02B**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Matter via Bridge | [HomeKit](https://smarthomecanon.com/platforms/homekit) | Via integration[^3] |  |
| Zigbee | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | Via integration[^1] | ZHA (needs a script) |

## Related pages

- [SONOFF sensors and buttons](https://smarthomecanon.com/lines/sonoff-zigbee-sensors) (line)
- [SONOFF](https://smarthomecanon.com/brands/sonoff) (brand)
- [Matter through a bridge](https://smarthomecanon.com/protocols/matter-bridged) (protocol)
- [Zigbee](https://smarthomecanon.com/protocols/zigbee) (protocol)
- [HomeKit](https://smarthomecanon.com/platforms/homekit) (platform)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)

## Sources

[^1]: SONOFF store: SONOFF AirGuard TH Lite Zigbee Temperature Humidity Sensor | SNZB-02B. https://sonoff.tech/products/sonoff-airguard-th-lite-zigbee-temperature-humidity-sensor-snzb-02b (manufacturer, checked 2026-10-10)
[^2]: Zigbee2MQTT: SONOFF SNZB-02B. https://www.zigbee2mqtt.io/devices/SNZB-02B.html (platform documentation, checked 2026-10-10)
[^3]: SONOFF Zigbee Bridge Ultra. https://sonoff.tech/products/sonoff-zigbee-bridge-ultra (manufacturer, checked 2026-10-13)