Home Security Battery Powered Vibration Detector Alarm * The Alarm protects your property by giving out alarm sound when it senses vibration, shaking, striking and moving. * Attach the Vibration Alarm to any place inside the steel safe.(there is magnetic bar inside the alarm). * Swith on the alarm and it will be on alert in 15 seconds, if there is any vibration, the alarm will sound for 25 seconds.(The beep sound is over 110DB), If the vibration continues, the alarm will sound again. * Control button by power On/Off, easy installation and use.