motorcycle lock,disc lock with alarm annunciator 100-110db Size:90*70*39MMAlarm:100-110dbAlarm principle: ... locked, and heard the "beep", the lock has entered the alarm status, 15 seconds later, when the lock or when the ... a "beep, beep, beep" sound the alarm 3 times, after continuous vibration, continuous alarm, sound the alarm for 10 seconds each time.2 ...