Hampton Bay HB-7612-02 is a wireless doorbell system that allows you to add a doorbell to your home without having to run wires. The system includes a doorbell chime and a push button, both of which are battery-operated. The doorbell chime can be plugged into any standard outlet, and the push button can be mounted on any surface using the included adhesive tape. The system has a range of up to 150 feet, so you can place the doorbell chime anywhere in your home and still hear the doorbell when someone presses the button.