[Metal Ring Design] With a ring, it can be hung anywhere, and it is also easy to take off and change to any place you want. [Smart Scene Linkage] Set up smart scene linkage with other smart home appliances (such as air conditioners and humidifiers) [Voice Control] Use for Alexa or Google Home to control the temperature and humidity sensor by voice. [ZigBee Communication] The sensor uses ZigBee communication to ensure a stable and reliable connection. [Indoor Humidity Detector] Detects indoor humidity levels and sends a notification to the phone when the humidity reaches a certain range. [Temperature Sensor] The sensor measures temperature and sends a notification to the phone when the humidity reaches a certain range. Note:The temperature and humidity sensor requires you to have a Tuya Zigbee gateway to work with it Colour:Black Material:Plastic Package Contents: 2 x Temperature and humidity sensor Only 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.