Combination Security: The 4-digit combination of this U-lock offers thousands of possible combinations, effectively preventing rapid password cracking and improving security. Keyless Design: Say goodbye to the hassle of losing keys. This U-lock features a keyless mechanism that greatly improves security, providing stable and consistent locking function without the need for keys. Robust Protection: Designed for harsh conditions, this bicycle U-lock can withstand harsh environments. It is resistant to breaking, cutting, and violent tampering attempts. Versatile Application: The long shackle and resettable padlock make this U-lock ideal for securing electric scooters, motorcycles, doors, etc., providing robust protection in various situations. Dimensions: 120 x 30 x 350 mm Lock beam thickness: 15 mm; Lock beam inner width: 73 mm; Lock beam inner height: 285 mm; Lock body total height: 350 mm Note: The data are all manually measured. Please allow 1-3 cm error. Due to differences in light