Keyless ConvenienceThis bike lock features a 4-digit code, so you don't need to carry a key with you, very convenient. No more worries about difficult unlocking, lost or broken keys. The U-shaped lock is strong and durable, locking and unlocking is very smooth. Portable and ConvenientThe bike U-lock is 227 x 110mm / 350 x 110mm, lightweight and easy to carry and store. It is widely used for mountain bikes, road bikes, folding bikes and glass doors, etc., to provide you with safety protection. High-quality materialA PVC adhesive protectively wraps the bolt of the lock, the hasp is made of high-quality steel with a water-resistant coating, which protects the lock from all harsh outdoor environments, it will not tear at low temperatures, will not deform at high temperatures, and extends the service life of the lock. How to set a passwordThe original password is 0-0-0-0, to set your own password: (1) Use a screwdriver to remove the protective cover of the reset button (2) Press the reset button "A" to "B" (3) Turn the dial to set your own password, make sure the number is on the convex line. (4) Press the reset button to "A" and fix the reset button protection cover with a screwdriver, then the setting is complete. For All Your Security NeedsThe bike lock is made of high-performance steel with strong fixing capacity to resist shear and pry attacks, and can withstand up to 12 tons of hydraulic shear force to protect your bike from theft. Features: 1. This bike lock adopts upgraded anti-theft and anti-pick design, which can effectively prevent theft and provide excellent security protection. 2. Adopting U-shaped anti-theft password lock, no need to carry keys, easy to lock and unlock by setting a password, free from the traditional key. 3. The bicycle lock is made of steel + PVC with a one-piece alloy structure and a thickened solid design, which can withstand attacks such as hammering, shearing and sawing, providing excellent protection. 4. The surface of the bicycle lock is polished and plated, making it waterproof, rust-proof and durable, able to withstand all kinds of humid environments and extend the service life of the lock. 5. The bicycle lock provides a four-wheel opening method, which rotates smoothly and allows users to easily set their own code. Easy to use, short unlocking time, convenient and practical. Specifications: Material: Steel + PVC Color: Black Size: 227 x 110mm / 350 x 110mm How to set a password: 1. The original password is 0-0-0-0, to set your own password. 2. Remove the protective cover of the reset button with a screwdriver. 3. Press the reset button "A" to "B". 4. Turn the dial to set your own password, make sure the numbers are on the convex lines. 5. Press the reset button to "A" and fix the reset button protection cover with a screwdriver, then the setup is complete. Packing List: 1 x Bike U-Lock