Connect the video doorbell to your doorbell and get an instant notification at home when someone rings the doorbell. The doorbell plugs into any outlet, you can place it anywhere in your home. Works with 433 MHz RF transmissions Supports 60 melodies and 5 volume levels < p>Music with light to alert you that someone has called No battery required, plugs into any outlet in the room. Features Features: Wireless Voltage: 5V Category: Doorbells This doorbell supports 433 connection protocol You can install the quick sound on any outlet on the board, plug it into the outlet, it can work with the doorbell camera. p> Check with Installation and make sure the installation the position of the doorbell can be changed. Receive WiFi signals and the signal strength is strong. Voltage: 5V Connect the video doorbell to the doorbell and get an instant notification of the information at your home. When someone rings the doorbell, the doorbell plugs into any outlet and you can place it anywhere in your