[High Decibel, 4 Sound Modes]: The bike horn produces a loud 140-decibel sound 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 motion or vibration is detected, the horn emits a loud alarm to help protect your bike. [USB Rechargeable]: Built-in rechargeable battery allows quick charging via USB. A full charge takes approximately 20 minutes and supports 3040 days of use, with up to 3,0004,000 activations and 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: The package includes only the items listed. Other accessories are not included. Note: Lighting and display settings may cause slight color variations between the image and the actual product. Measurement may vary by +/- 13 cm.