1. Wireless,no need 2. Operating range:150m 3. 58pcs selectable music 4. 4 grade volume levels (25-100 dB) 5. Self-learning code function 6. Transmitter waterproof range:IP55 7. Music and indicator light with 3 modes for chosen, Ringing+Flashing Light,Ringing only,Flashing light only 8. Music IC with memory function,ringtones and volumekeep same when powered off 9. When someone ring the doorbell,mobile receive pushmessage by Tuya APP 10. APP:Tuya Smart,compatible with IOS&Android smartphone TECHNICAL PARAMETER: 1. Rated Voltage:AC110-240V,50-60HZ 2. Volume:25-85dB 3. Working Frequency:433MHz& 2.4G WIFI 4. Wi-Fi:2.4G IEEE802.11b/g 5. Receiver Standby Power: Less than 0.5W 6. Transmitter:CR2032 battery 7. Transmitter Operation Power: Less than 10mW Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. voltage: AC220V Colour:White Material:ABS Attention: Default Plug: EU Plug Package Contents: 1 set * Tuya WIFI Wireless Doorbell 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.