STW 10Pcs Wireless Home Door Window Burglar DIY Safety Security alarm System Magnetic Sensor 100% New and high quality Magnetic sensor switch detects entry protecting your home or office whether you are in or out. Dustproof and insect prevention Easily mounted by adhesive. Type to window or door. Ideal entry warning for homes, apartments, mobile homes, do rms, offices, hotel rooms, garages, and more! Super environmental suitability and stability