Super environmental suitability and stability. | The alarm gives out clear and loud sound when an intruder breaks in. Wireless magnetic sensor switch. Freely switch control. Emit super loud sound once burglar gets in. Suitable for window or door warning. | Easily mounted by adhesive. Type to window or door. Ideal entry warning for homes,apartments,mobile homes,offices,hotel rooms,garages,and more. | Super loud 95 dB alarm. When someone opens the door or window illegally (the relative position of the primary and secondary parts changes), the alarm can issue a strong alarm, warning the intruder to leave and remind the owner | Magnetic sensor switch detects your door or window.