Features11. [High Decibel, 4 Sound Modes]: The sound of a bike horn is loud enough to reach 120 decibels and has four sound modes, enough to alert the surrounding pedestrians of your presence and ensure your safety during riding. 22. [Upgrade Design]: bicycle horn with a stylish and compact appearance that complements your bike. Fixed by straps, which are easier to install and disassemble, no tools required, and easy to use. 33. [Anti-theft Alarm]: Long press the left button of the bicycle horn to enter the early warning state. If shaking or vibration is sensed after that, the superbike horn will immediately emit a loud alarm to protect the safety of your bike. 44. [USB Rechargeable]: The bike horn for adults built-in USB rechargeable battery, easy to use. Fully charged in 20 minutes, this electric bike horn can be used for 30-40 days, ring 3000-4000 times, and stand by for 180 days. 55. [Waterproof and Durable]: Ipx4 is waterproof, dustproof, and shatterproof, the loudest bike horn can be used on rainy days, regardless of weather factors, and fully meet your outdoor riding needs.SpecificationMaterial: ABSColour: BlackSize: 6*3.4cmBattery capacity: 200mAhDecibel: 120bdWaterproof: Ipx4Package List1 *Electric Horn1 *Charging Cable1 *Strap