Aozbz 100db motorbike has disc lock alarm sound is able to reach to 110 db, weatherproof, mechanical lock core is rigorous, technical opening is very difficult, disc brakes with thickness of up to 7mm, light weight and easy installation, lock slot size 5.5 x 3.7cm / 2.2 x 1.2 .3″, lock stick dia 6.5mm, battery 6xAG13 button battery included.