Features: Effective anti-theft: The width of the lock body up to 36mm, can not be drilled, smashed, anti-theft and anti-drill effect. Overall waterproof: Lock cover and lock body to form a closed space, the battery and circuit board in the closed space state can not touch the water, to provide maximum protection. Stainless steel lock cylinder: Stainless steel blade lock cylinder with complex internal structure to improve the hardness and strength, thus resisting damage by external forces. Security: Up to 110db burglar alarm, lock core power support, once the body touches the vibration, will emit an ear-piercing sharp alarm sound, enough to deter and scare off thieves. Keyless to lock: Locking does not require a key, eliminating the trouble of finding a key, press against the disc brake disc to lock, a convenient helper for your outdoor riding. Versatility: Suitable for motorcycles, bicycles, scooters and any vehicles with holes or spokes on the wheels. Specifications: Model: L4168BK Color: silver\black\bronze(optional) Material: stainless steel+zinc alloy Battery type: LR44(AG13) Package size: 17 * 11.7 * 7cm Package weight: 696g Package List: 1 * Lock 3 * Keys 6 * Spare Battery 1 * Screwdriver 1 * Carrying Bag 1 * Reminder Cable 1 * Instruction Manual