Wired Door Window Contact Magnetic Sensor Intrusion Detector

Features: *This sensor can't work alone, it needs to work with wired alarm host or other wired devices. *Simply attach one piece to your door or window, and attach the other piece to the door or window frame. *Low-consumption design, more power-saving. *Excellent design, tiny and fashion. Easily install with screws. *Ideal intrusion warning for homes, apartments, mobile homes, dorms, offices, hotel rooms, garages, etc. Discounted at only: US$ 9.93