Item specifics:Type: Electric HornMaterial: ABS, PCColor: BlackSound mode: 3Sound: 110-120dBCharge input: 5V-250mABattery capacity: 280mAhCharging time: 1.2 hoursSize: Approx. 49 * 66mm / 1.93 * 2.59inNet weight: 40gBicycle Bell Usage: Mountain Bike / Road Bike / Fixed Gear Bikes Characteristic:*100% brand new and high quality.* Compact size, light weight, big sound speaker.* 120dB high ringtone to protect and support your driving.* With the built-in boost circuit, the sound can reach 120dB.* Built-in 280mAh lithium battery, equipped with standard USB charging, 1.2 hours can be filled, charging can last 2000 times, about 20-30 days of normal use.* It is designed for the mini size of a watch. You can hide it in the grip without interfering with the operation of the handbrake, gearshift or other supports.* Waterproof, dustproof and dropproof, very convenient for your daily use.* Silicone tape is suitable for various handlebars from 22-31.8mm. Delivery content:1 piece horn with cable switch1 piece of silicone strap1 piece of USB cable1 piece of user manual