Features: Engineered with a 110dB sensitive alarm systems and premium alloy steel construction, this anti theft disc brake lock delivers fast security alerts and cut resistant durability for motorcycles, e bikes, and bicycles. Its compact yet robust design features tool easy installation on disc brakes, general compatibility across vehicle types, and portable storage – ideal for riders prioritizing theft prevention without bulk. Perfect for motorcycle owners, city e bike commuters, and cycling enthusiasts seeking stable defense against theft in high risk areas or crowded public spaces. protect your ride during street parking, shopping mall stops, or overnight storage with shaking triggered alarms and grade shackle resistance against bolt cutter. Weather resistant alloy construction ensures year round reliability, while the thin profile fits effortlessly in saddlebags or under seats for on the go security readiness. Specifications: Component : metal Size: about 66x88mm/2.6x3.46inch Battery: included Alarm volumes: 120dB Package Includes: 1 set Disc Brake Lock note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.