High security and resettable Smart wind-up lock, 4 digits and resettable, can set up 1.0000 different combination codes, factory default password is 0000. 1. Align the initial password with the position marked by arrow2. Turn the lock as shown in picture 3. Turn the word wheel to set the desired password. 4. Return the lock to the starting position, the password has been set successfully. Sturdy lock This bicycle cable is made of strong steel cable, the coating PVC protector prevents scratches and lasts longer. With high strength zinc alloy lock head, sturdy, durable and anti-rust. Free combination 2 bike locks are included and meet all your requirements. Each bike lock can be used separately or combined with each other, you can freely combine them into a larger lock which is endless and widely used. Easy to carry The bicycle safety lock has a mini design, is lightweight, can be carried on the backseat, in the frame or in a bag, etc. It's elegant and beautiful, and goes with a beautiful scenery with your bicycle. Wide application Not only used in bicycles/e-bikes, but also other equipment outdoor / sports (eg scooter, gate, etc.) With regular lubrication of the keyhole and keyhole, the life of the lock can be effectively extended. 14 *13cm