security burglar alarm lock, anti-theft,burglarproof lock

详情

This kind of lock will siren in loud sound if it is touched or shake. Widely used in motorcycle, bike, door ect . There are two layers in the lock, when key insert into the key hole , the key can enter the first layer , this will lock the lock, but the lock won't siren . If you want it not only with the lock function , but also with the siren function, then let the key continue to insert to the second layer, then after *0 seconds of time, this lock can work as lock and with siren function . The lock goes back to normal to its alertness state when it is opened with right key .