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 required. Keep a distance of less than 80M between SNZB-02 and Zigbee Bridge (open space). Alexa only supports checking temperature. SONOFF Zigbee 3.0 USB Dongle Plus is a universal Zigbee USB stick. It can be used as a universal Zigbee gateway in Home Assistant or other open-source platforms via ZHA or Zigbee2MQTT to locally control all your Zigbee sub-devices, so you don't need to invest in the Zigbee hubs for different brands, all you need is a universal gateway - Dongle Plus! The dongle plus has a wide range of supported devices, such asBASICZBR3,