High-decibel bicycle electric horn helps you open the road unobstructed on noisy streets, making riding safer. With anti-theft alarm function, real-time protecting your bicycle. Features: Loud Horn: 120dB loud electric horn, supports 4 sound modes, effectively reminds the surrounding pedestrian and vehicle, and makes riding safer. Anti-Theft: One-click to turn on the anti-theft alarm mode, which is sensitively triggered, and immediately alarms when it is vibrated to ensure the safety of your bicycle. Built-in Battery: Built-in large-capacity rechargeable battery, low power consumption and long endurance, support powered by PC/laptop, power adapters, USB hub, etc. Reliable Quality: Made of high-quality ABS, it has nice durability. Sealed and dustproof, waterproof and shockproof, it is not afraid of rain. Easy to Install: Small size and lightweight, easy to install, will not block the line of sight, perfect for mountain bikes, road bikes, electric scooters, etc. Specifications: Color: Black Material: ABS Sound Decibel: 120dB Battery: Built-in 200mAh Lithium Battery Item Size: 60 * 34 * 34mm/ 2.4 * 1.3 * 1.3in Item Weight: 25g/ 0.9oz Package Size: 65 * 75 * 35mm/ 2.6 * 3.0 * 1.4in Package Weight: 53g/ 1.9oz Packing List: 1 * Bike Horn 1 * Silicone Strap 1 * USB Cable