The wireless doorbell allows a simple installation avoiding the wiring and works for its installation. It consists of a switch suitable for installation in the outdoor and two doorbells with 48 selectable melodies. You can also adjust the ringer volume. The wireless range is 280 meters in open spaces. The bell is connected directly to a plug and the switch is powered by a 12V battery already included. Screws and lugs are included for the surface switch installation.