Features:【Real-time Temperature & Humidity Feedback】Set the smart scenes to make your home at a comfortable level. Trigger the fan or humidifier when your home does not reach your expected environment. Check your mobile phone to get the sync data of the temperature and humidity.【Easy Installation & Convenient】With a tiny shape and the help of 3M adhesive at back, it can be easily installed at any corner of your home.【Voice Control】Compatible with Amazon Alexa and Google Assistant. If your Alexa has built-in hub, SNZB-02 can be directly connected to it without other Zigbee Bridge.【Low-battery Notification】Replace the battery in time with a notification when the battery life is 10% remaining.【Note】Zigbee Bridge and batteries are required. Keep a distance of less than 80M between SNZB-02 and Zigbee Bridge (open space). Alexa only supports checking temperature. Package:3*SNZB-02 1*User Manual