DREAMSKART Secure Anti Theft Motion Sensor Alarm Lock , Standard, Black Have peace of mind when stepping outdoors or moving away from your valuable belongings. The security pad lock with smart alarm motion sensor is a utilitarian device suitable for attachment on garden sheds, garages, houses, caravans, gates, vehicles and more. It ensures reliable protection of your precious entities with its built-in safety system that activates the alarm automatically the moment an intruder tampers with the lock. An encroacher might just attempt to break the lock with a wrong key or attempt to directly bang on the lock, in such scenarios, this security pad lock will initially ring a warning beep with little meddling movements followed by the proper alarm ring with heavy banging/breaking force. Alarm siren function: first insert the key and rotated to open the lock then put lock rod with a concave groove towards the key port down when you hear the sound"di" that means the lock is coming into alarm situation, after 5 seconds, when the lock is vibrated again, it will give an alarm and keep alarm serial movement or vibration and each alarm will last 10's if in a minute without triggering, goes back to the actual function. Specifications:: name: alarm padlock color: black material: zinc alloy alarm decibel: 110db power: 6 x lr44 button batteries (Included).