... with adding alarm 2.used for door, car, bike etc. 3.rainproof and weatherproof 4.soud level is 110dB This Padlock ... circulatly, then return the lock hole and lock the lock.3) When the lock comes into alarm situation,after15 seconds, the ... , locker, lockroom , etc.; 2) 105-110 db alarm sound; 3) Auto-alarming system & locking system; 4) Can be used alarmed or unalarmed states; 5 ...