Smart LED Light Easier to see your secret code and lock / unlock your bike in the dark, you don't need to open the cellphone light to lock the bike. The light will automatically turn off about 15 seconds 4-digit combination The 4-digit contains 10,000 kinds of groups of passwords, which is almost impossible to crack (1 / 10,000 chance). You can define your own combination of custom numbers or groups of meaningful numbers. Zanmax bicycle lock provides the most security available to your bicycle. The default code is 0000, please refer to the instructions in the description or photo to set your personality numbers. It is easy. Strong resistance of saw cutting tools and waterproof Bicycle lock spiral cable is made of military material, which is very difficult to cut, prevent your bicycle from being Fly. In addition, the keyhole was made from waterproof metal Mountain bracket Equipped with a can mounting bracket, you can fix this bicycle lock on the bicycle axles. The self-winding and compact mounting bracket makes the padlock convenient to carry. This rack can be applied to all kinds of bikes, handy when going out. Versatile Bike lock cable is 4.9ft / 1.5m, long enough to lock 2-3 bikes together, Or ideal for sheds, mobile trucks, motorhomes, trailers, bicycles, skateboards, gates and fences, barbecues and mowers, sports equipment, toolbox and ladder, etc How to set the combined password : (The default password is 0000.) 1. Dial the number wheels to 0000 and remove the cable. 2. Rotate the padlock core 90 degrees clockwise to the position shown. 3. Reset the 4-digit password to whatever you want, making sure these digits line up with the pointer. 4. Turn the locking core counterclockwise to the original position. We will do our best to provide you with satisfactory service!