Alarm Padlock 110dB Siren Heavy Duty Security Alarm Lock for Bicycle Motorcycle Door Gate Bike Shed Bolt Chain Lock, with two different Lock beam.

Weather Proof Padlock With Built-in Alarm System Anti Theft Motion Sensor.
This alarm lock combines locking with alarming function.
It is a good tool for you to protect your properties. Can be set to two states: mechanical lock and alarm. Supplied with three keys, convenient to use. Features: - 110 dba Alarm Level (Very Loud) - Two sizes available: Short-Beam & Long-Beam - Black Colour - Long Lasting - Alarm will go off when the lock feels vibration or movement - Comes with 3 keys as spare
It has low false alarm rate and power consumption. it can be used on door, bicycle, motor, container, etc.
Combines locking function with alarming function. Low power consumption.