The GE 56789 Wireless Window Alarm is a quick and affordable way to add security to your home. It is battery powered so no professional wiring or installation is required. Simple mount the magnetic sensor to the window using double sided tape and mount the alarm on the frame. When you want the alarm active, just switch the alarm to the ON position. When then the sensor moves away from the alarm (when the window is opened) a loud 120 Decibel Alarm will activate.