The chime connects to our Wi-Fi Video Doorbell to alert you when the door bell has been pressed. Comes with multiple tones, select different tones for different notifications. Easily control the volume so you can hear all over the house. 4 Levels of adjustable volume with 38 customisable chime sounds plus a silent mode. Plugs into any standard power outlet. Works up to 20m distance away from the Smart WiFi Video Doorbell.