The Wireless Door/Window Sensor is a magnet contact switch that is powered by a solar cell. The sensor can be used to transmit window or door status wirelessly with no batteries. Rolling back temperature setpoints based on the window/door status or activating a lighting load when someone enters a room are just a couple of the applications for this versatile device. Using a simple 'peel and stick' process, the Wireless Door/Window Sensor makes it quick and easy to provide energy saving control to an office, hotel room, or condominium.