Magnetic Door/ Window Alarm

This compact, attractive Magnetic Door/ Window Alarm uses magnetic affinity to initiate its 110 decible siren. The base of the alarm is bolted to door or window frame, the actuator is connected to the window or door. The alarm is activated by opening the door or window. Great for any door or window, particularly those hard to protect sliding glass doors. Requires 3 lithium button cell batteries (included).