Smart Digital Wireless Home Music Doorbell One For Four Long-Distance Waterproof 58 Music Doorbell With Memory

Music: 58 music (factory default Dingdong Dingdong)

Volume: 4 levels of volume

Transmitter: with indicator light, press and light

Receiver: Just plug in when the bell rings

Transmitter: use a 12V23A battery

Receiver voltage: 110-220V

Transmitter size: 77mm*46mm*20mm

Receiver size: 95mm*65mm*33mm

Remote control distance: 300M in a straight line on the open ground (data from factory laboratory)