[Metal ring design] With a ring, it can be hung anywhere, and it is also easy to remove and change to any place you want. [Smart Scene Linkage] Set up a smart scene linkage with other smart (such as air conditioners and humidifiers) [Voice Control] Use Alexa or Home to control the temperature and humidity sensor with your voice. [ZigBee Communication] The sensor uses ZigBee communication to a stable and reliable connection. [Indoor Humidity Detector] Detects the indoor humidity and sends a notification to the phone when the humidity reaches a certain range. [Temperature Sensor] The sensor measures the temperature and sends a notification to the phone when the humidity reaches a certain range. Colour:black Material:plastic Note: The temperature and humidity sensor requires a Tuya Zigbee gateway to work with it Package Contents: 1 * 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.