Temperature and Humidity Monitoring Sensor Easily check real-time temperature and humidity on your phone to accurately monitor the conditions of any environment. Zigbee Smart temperature and humidity sensor. It detects the surrounding temperature and humidity, displaying real-time data on the LCD screen. When paired with a Zigbee gateway, users can monitor temperature and humidity changes via the app or set up smart scenes with other devices to achieve home automation. * Requires Zigbee Bridge * Manual https://sonoff.tech/product-document/gateway-and-sensors-doc/snzb-02wd-doc/ Technical Specifications Model: SNZB-02WD Wireless Connection: Zigbee 3.0 Battery Model: CR2450 (3V) (included) Working Temperature: -9.9°C ~ 60°C Working Humidity: 5% – 95% RH (non-condensing) Casing Material: PC Dimensions: 62.5 × 59.5 × 18.5mm Color: White