Features:
* This sensor cant work alone, it needs to work with wired alarm host or other wired devices.
* Simply attach one piece to your door or window, & attach the other piece to the door or window frame.
* Low-consumption design, more power-saving.
* Excellent design, tiny & fashion. Easily install with screws.
* Ideal intrusion warning for homes, apartments, mobile homes, dorms, offices, hotel rooms, garages, etc.