Power supply chime: 120 VAC - 60 Hz push button, uses (1) - 12 volt A23 battery (included). Magnetic sensor uses (2) - 12 volt A23 batteries (included). Chime base electronic with speaker. 128 selectable channel codes. 315 MHz RF frequency. Kit includes (1) plug-in wireless chime, (1) wireless push button, (2) battery-operated magnetic sensors, (2) door magnets, (2) spacers, (3) 12 volt A23 batteries, (1) hardware pack. Transmission range up to 100 feet. Front door sound 8-note Westminster (default) or 2-note ding-dong (sound "G"). 75 decibel maximum. Back door sound: 1-note ding. Chime dimensions: 3.5" wide x 5.125" high x 1.375" deep. Appliance White. cULus Listed.
Battery operated. 13 sound options set at button, different sounds for front and back doors. Snap-out panel can be wallpapered or painted, light and dark oak snap-in wood trim included. Selectable codes to eliminate interference, up to 150' operating range.