SONOFF SNZB-02B AirGuard TH Lite Zigbee Temperature Humidity Sensor, Thermometer Hygrometer with App Alert, Remote Monitoring for Greenhouse & Wine Cellar, Works with Alexa & Google Home, 4-Pack

Price: $35.90
(as of Oct 10, 2026 04:43:47 UTC – Details)

From the brand

Water valve series

Dongle-M

TRVZB

[High Precision & Fast Refresh] Built-in Swiss professional-grade sensor, delivering temperature accuracy of ±0.2°C/±0.4°F and humidity accuracy of ±2% RH. Updates every 5 seconds for real-time.
[Environmental Monitoring] Monitor temperature, humidity, dew point, and VPD remotely via the app. Its compact, ultra-slim design fits easily into tight spaces such as guitar cases, reptile terrariums, and other confined areas.
[Long Battery Life] Powered by standard AAA batteries for easy replacement, offering up to 2 years of battery life. Ideal for hard-to-reach installations like attics or storage cabinets, eliminating the hassle of frequent recharging.
[Comfort Alerts] Customize temperature and humidity thresholds and receive instant app alerts when values exceed your settings. Supports smart scene automation with smart plugs to control fans, humidifiers, and other devices automatically.
[Zigbee 3.0 Compatible] Based on the Zigbee 3.0 protocol, compatible with iHost, NSPanel Pro, ZB Bridge Pro, and other Zigbee gateways. Also supports Echo (4th Gen), SmartThings Hub V3, and selected third-party Zigbee hubs.
Customers find the temperature and humidity sensor to be great in quality. However, the connectivity and reliability aspects receive mixed feedback, with several customers reporting that the sensors disconnect within an hour and only three out of four units work properly.