This alarm lock combines locking with alarming function. It is a good tool for you to protect your properties. It has low false alarm rate and power consumption. And it can be used on door, bicycle, motor, container, etc. Features: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. Powered by six button batteries. The product has 6 electrons built in, and a set of 6 electronic spares. A set of electronics can be used for about 6 months. The more the number of alarms, the shorter the usage time. Supplied with three keys, convenient to use.