NEDIS ALRMGBD20WT Window sensor White

This ultra-thin glass break detector has an integrated window/door alarm that is activated when the window or door glass is broken or when the door/window is opened. With the switches on the side of the alarm, you can switch it on and off if necessary and adjust the detection sensitivity. Its slim profile makes it ideal for mounting on a window or door. The alarm requires 2 CR2032 batteries (included), which have an average lifespan of one year. The alarm indicates when the batteries are running low, and you can press the "battery test" button at any time to check the battery status. No tools are required to mount the alarm: it has magnetic sensors and comes with double-sided adhesive tape (included). Stick the alarm to the door glass or window and place the magnetic sensors on the door or frame, and you're done.