CACAZI A20 Smart Home Wireless Doorbell Digital Music Remote Control Doorbell, Style:US Plug(Black)

1. Material: ABS, electronic components
2. Power supply mode: AC
3. Receiver power supply voltage: 110/220 (V)
4. Transmitter: 12V, 35A battery (delivered with battery)
5. Music selection: 36 ringtones
6. Volume selection: 4 levels of volume adjustment
7. Power consumption: 1 (W)
8. Working range: 300m
9. Dimensions: Transmitter: 7.7 x 4.6 x 2 cm, Receiver: 9 x 5.6 x 2 cm