Feature:1. Portable helmet lock, using high‑quality zinc alloy + steel wire material, wear‑resistant.2. Outer layer wrapped with PVC, which can prevent bike body from being scratched. Flexible and retractable steel cable has various uses.3. Password lock, when password is correct, it can be unlocked by gently pulling it, and it can be quickly locked by plugging it in.4. The helmet can be locked firmly, and the helmet can be wrapped around the body when resting, which is convenient and quick.5. Small in size and easy to carry, it can be placed in the car bag or wrapped around the at will.Specification:Item Type: Helmet LockMaterial: Zinc Alloy + Steel Wire + PVCSize: Approx. 9cm / 3.5inLongest Stretch of Lock Rope: Approx. 150cm / 59.1inPassword Modification Method:1. Initial password 0000;2. In the unlocked state, turn the lock hole on the right side of the password clockwise;3. Modify your password, and then turn the keyhole on the right side of the password counterclockwise;4. The password is successfully modified. Package List:1 x Helmet LockNote:1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. The 4‑digit password needs to be aligned with the arrows at both ends.