Motorcycle Alarm Lock Anti-theft Reminder Bike Disc Brake Lock Loud Warning Security Alarm Protection for E-Bike Bicycle Scooter. Features: waterproof, keyless locking, large capacity battery, universal for motorcycle, road bikes, mountain bikes, electric scooter. Specification: main material zinc alloy, product colors black, red, yellow, blue, orange optional, product size about 90x68x33mm/3.54x2.67x1.29inch, net weight of product about 282g, battery 6 button battery.