Features: Anti-Theft Alarm: Press and hold the button for 3 seconds to turn the bell into an alarm that can reaching you even when you are in distance. Long Battery-Life: With a 200mAh rechargeable batteries, this bell can chiming 1500 times on a single charge, which can be completed in just 1.5 hours with the included USB cable. Universal: Comes with two straps of different lengths to fit all types of bikes, including electric bikes, road bikes, mountain bikes, and scooters. Durable: Certified IPX5 waterproof, dustproof, and shockproof, this electric bell is built to withstand difficult conditions and last for years. Service:If you have any question,please contact us to provide great service. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material:Plastic/Resin Size:38*60cm Package List: Bike horn*1