Mengshen Wireless Remote Control Vibration Alarm Home Security Door Window Car Motorcycle Anti-Theft Burglar Security Alarm Safe System Detector MS-Z02 The remote vibration alarm is used in occasion with vibration, suitable for electric car, motorcycle, car burglar alarm, also used in door, window, safe case, wall, file cabinet, electric retractile door, electric door, mechanical equipment and various kinds of objects indoor and outdoor. In case of light vibration, movement or trigger, it will give loud alarm 120dB to alert thieves. This product doesn't need external power source. It uses 9V laminated cell, which can last for 3 months, low power consumption, remote control distance within 20 meters. In case of vibration, shock or movement, the receiver will give alarm above 120 dB, lasting for 20 seconds. Easy to Install: With magnet inside, the product can be attracted to iron objects.