Creazy 10Pcs Wireless Home Window Door Burglar Security Alarm System Magnetic Sensor

100% Leather
Super loud 90 dB alarm
Convenience in installation--just peel and stick
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!
Magnetic sensor switch detects entry protecting your home or office whether you are in or out
Operated by 3pcs of 1. 5V LR44 / AG 13 button cell ( included )