DescriptionThe item is a universal practical anti-theft disc brake lock to protect the motorbikes or bikes from being stolen. Mainly made of premium zinc alloy with surface sprayed, this lock has good corrosion resistant and water resistant performance, sturdy and durable to use. It adopts advanced tamper-resistant lock core to be scarcely opened by other keys. The alarm will go off with 110dB sound if there is anyone trying to steel your vehicel. The disc brake lock can be used for locking the bicycles, motorcycle, scooter, and other electric vehicles to keep your riding partner safe.Feature- Color: Black - Material: Zinc alloy and stainless steel - Size: 9 x 7 x 3.5 cm - Latch diameter: 7mm - Anti-Theft. Adopts professional anti-theft tamper proof lock core to be scarcely opened by other keys, keeping your riding partner and your belongings safe. - Auto-alarm and auto-lock system. Easy to lock. Directly press the lock cylinder and lock it to enter the alarm status at the same time, and you just need to use the key to open the disc lock to release the alarm. - 110 db alarm device. A blaring siren will go off if there is anyone trying to steel your vehicel with constant shaking and vibrating. - Water proof and weather resistant. Full zinc alloy body with surface sprayed, this lock has good corrosion resistant and water resistant performance, sturdy and durable to use.- Wide application: for motorcycles, bikes, scooters, etc. 7 mm lock pin diameter makes it possible to fix on most wheels with holes or spokes.Using instructions- When the alarm sound becomes too low, the battery needs to be replaced. Firstly screw out the bottom four screws, remove the cover then replace the batteries, and you must pay attention to the battery "positive and negative" pole. (Lock on the disc brake cannot remove screw) - By vibration warning 3 sound as a warning, the owner open the lock, will not alarm.Notes1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you for your understanding! 2. Please allow 1-3cm measuring deviation due to manual measurement.