[High Decibel, 4 Sound Modes]: The bike horn produces a loud sound up to 140 decibels and features four sound modes, effectively alerting nearby pedestrians and enhancing rider safety. [Upgrade Design]: This bicycle horn has a sleek, compact design that complements your bike. It is secured with straps for easy installation and removal, requiring no tools. [Anti-theft Alarm]: Press and hold the left button to activate the alarm mode. If movement or vibration is detected, the horn will emit a loud alarm to help protect your bike. [USB Rechargeable]: Built-in rechargeable battery with USB charging. Fully charged in 20 minutes, it provides up to 30-40 days of use, supports 3000-4000 rings, and offers up to 180 days of standby time. [Waterproof and Durable]: Rated IP65 for waterproof, dustproof, and shock-resistant performance, making it suitable for use in various weather conditions, including rain. Color: black Material: plastic Package Contents: 1 x Electric Bike Horn, 1 x USB Cable Note: Light shooting and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.