No key required] No key is required to secure the bike, electric scooter, or gate. No more worrying about forgetting your key. RESET BUTTON: The Reset button can be operated with a simple Phillips screwdriver, but you need the correct password to press A through B to reset the password. You cannot change the password without pressing A to B. [Zinc alloy / PVC processing] The 14mm hardened zinc alloy shackle withstands the attack of knives and levers. The thick PVC protective cover and zinc alloy key are rain resistant, rust resistant and durable, making it safe to use in rainy environments. [Easy] Use your fist to easily set your own four-number combo. Smooth dial rotation gives confidence in quality. [U-shaped lock size] 8.42 in (long) ×3in (width) ×0.55 in (thickness) U-shaped lock Weight: 0.65kg! Since it is a basic U-shaped lock, it can be used with many car models. Applicable not only to bicycles, but also to motorcycles, electric vehicles, offices, patios, etc.!