1.Can view working temperature and working humidity 2.Real-time monitoring of environmental changes(Fahrenheit and Celsius can be converted) Key operation: 1. Song selection key: After the product is powered on press the selection key once to play the first song and then press it again to automatically play the next song. 2. Volume button: The product generate to the loudest volume after power-on. Press it once for mid-range volume press it again for low volume and press it again for mute. 3. Setting key: time setting function long press for 3 seconds to enter the time adjustment mode short press to set the number the interval of two seconds is the jump interval after 3 seconds do not perform any operation to exit the setting automaticly 4. Cycle key: Press once to switch between Fahrenheit and Celsius 5. Code recording method: After the product is powered on long press the volume button without letting go then press the transmitter Certification:CE Smart home platform:None Origin:CN(Origin) Itercom:No Connection Type:wireless Alarm:No Power:Dry battery Feature:None Item Type:Wireless Doorbell Product name:Wireless Doorbell Item type:Smart Doorbell Color:Gold Product number:16001600 Features 1:Digital Smart Door Bell Features 2:Home Welcome Doorbell Features 3:Doorbell with Temperature Humidity Time View Features 4:Home Wireless Doorbell Features 5:Self-Powered DoorBell Features 6:With humidity detection Features 7:doorbell with Temperature display Features 8:doorbell with Humidity display Features 9:Self-powered wireless doorbell Features 10:timbre inalambrico exterior Features 11:sonnette sans fil Features 12:sonnette