motorcycle lock,disc lock with alarm annunciator 100-110db Size:90*70*39MMAlarm:100-110dbAlarm principle: ... , and heard the "beep", the lock has entered the alarm status, 15 seconds later, when the lock or when the vehicle is shaken ... , after continuous vibration, continuous alarm, sound the alarm for 10 seconds each time.2. With a key to open the lock will stop the ...