Description: 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.Corrosion resistant, waterproof and durable to use.Powered by six button batteries.Supplied with three keys, convenient to use.