SNZB-02D is a Zigbee temperature and humidity sensor, to monitor your home's temperature and humidity for a comfortable life, and there are icons to indicate Hot/Cold/Dry/Wet air conditions, reminding you to adjust your humidifier or dehumidifier accordingly to achieve optimal comfort, also power icons to know the current power usagethe high accuracy built-in -made sensor ensures accurate measurement of room temperature and humidity, the temperature is accurate up to 0.2 while the humidity is 2%RH, data is updated every 5s, always gives you the latest changes in the environment.The SNZB-02D sensor supports APP monitoring, you can not only check the current temperature & humidity on the LCD display, but also track the real-time and historic temperature or humidity data via the app on your phone, with up to 120m/400ft coverage (no obstructions and perfect conditions), you can check the latest data at any time, and once the temperature or humidity exceeds the preset range, you will receive an instant alert from the APPyou can export data as .CSV files, the temperature and humidity of the sensor can be set as triggers, such as setting the humidifier to turn on when the humidity is less than 40%, adjusting to the comfort temperature and humidity at any time for , it works with Alexa and Home, just ask Alexa or Home and you'll know the temperature or humidity.Colour:WhiteMaterial:plasticPackage Contents:1 x Temperature Humidity SensorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.