This padlock is made of aluminum alloy and is waterproof. It has a longer service life than other locks. This alarm lock features a mechanism that triggers an alarm emitting a loud sound when locked or shaken, helping to deter theft. It is a practical choice for security needs. Features - Color: Black - Material: Aluminum alloy - Size: About 10.00 x 9.50 x 3.20 cm / 3.93 x 3.73 x 1.26 inches - Made of durable aluminum alloy material - Compact size design allows for easy portability - The package includes 6 keys, 2 padlocks, and 12 button batteries for convenience - Widely used to help prevent theft of doors and windows, cabinets, bikes, motorcycles, and more Package list: 2 x Security Alarm Locks 6 x Keys 12 x Button Batteries