KKmoon Anti-Theft Security System Keyed Padlock, 110dB with 3 Keys, Black Combines locking function with alarming function. Built-in movement triggered alarm, which can emit loud sound when the lock is hit or shaken. Adopts MCU core procedures, high-tech integrated circuit and digital sensor chip. Can be set to two states: mechanical lock and alarm.Low false alarm rate. Low power consumption. Can be used on door, window, bicycle, container, motor bike, tricycle, pull gate, garden, etc.