Voye V008A Wireless Doorbell Plug-in LED Cordless Doorbell Chime Home Remote Control Button With 38 Music Easy for installation, Environment friendly energy saving system, The doorbell receiver does not need batteries, it has a plug that you plug into a wall socket. When the door bell rings, the receiver lights up and plays the ring tone you choose. There are 38 ring tones and it was fun listening to them and then picking the one we wanted. Remote controller can be powered by 23A 12V battery (included). Brand new New Home Security Cordless /Wireless Remote Doorbell Wireless system. 80m 4D remote control distance, 38 tune songs for selection. You can enjoy the music from VOYE in your space and share the happiness of knowing the arrival of your friends.