1. Project type: Anti-theft bicycle lock 2. Material: PVC, steel wire 3. Weight: Approximately 500g/17.64oz 4. Length: 1.2m/3.94ft 5. Battery model: 2032 button battery (built - in battery) 6. Packaging list: - 1 x Anti - theft bicycle lock 7. Features: - 1. Sturdy lock head: The lock head is made of materials that resist cracking and deformation. It has high strength and hardness. - 2. Sturdy chain: The outer layer of the chain is made of PVC and embedded with rigid steel wire (not easily scratched), making the lock more robust and secure. - 3. Easy to use: It uses a keyless convenient lock, so you don't have to worry about losing keys or forgetting to carry them. You can reset the password using a secure 4 - digit combination lock. - 4. Combination password: Multiple combination passwords can be set, and the probability of the password being cracked is extremely low. The default password is 00000. - 5. With LED light: The top of the combination lock is equipped with an LED light, allowing you to unlock the lock easily even in a dark environment.