Connect the video doorbell to the doorbell and receive instant notification in your home when someone rings the doorbell. The bell plugs into any socket, you can place it anywhere in the house. Works with 433 MHz RF transmissions Supports 60 melodies and 5 volume levels < p>Music with light to mention that someone has rung No battery required, connect to any socket in the room. Features Features: Wireless Voltage: 5V Category: Doorbells This doorbell supports the 433 connection protocol The quick sound can be installed in any socket on the board, plug it into the socket, it can work with your doorbell camera. p> Please check with the Installation make sure the installation location of your doorbell can be changed Receive WiFi signals and the signal strength is strong. Voltage: 5V Connect the Video doorbell with the doorbell and get instant notification in your home When someone rings the doorbell, the bell plugs into any power outlet and you can place it anywhere in your home.