[130db Bright Alarm] -The horn loudness 130db, can issue a warning that can not be ignored, attract more attention, avoid more accidents on the road, help to warn other vehicles and pedestrians, ensure your safety. [Low power, high performance] - The speaker uses 12V DC power supply, low power consumption, through this efficient speaker can improve the vehicle's output sound quality, and produce clear and loud sound. [General Speaker]- is suitable for DC 12V vehicles such as automobiles and trucks. It is suitable for most motorcycles, all-terrain vehicles, karts, off-road vehicles, pocket bicycles and 12V power cars.Item Dimensions LxWxH 6.38 x 3.98 x 4.84 inches [Strong, durable, waterproof] - The use of high-quality ABS material + waterproof shell, fixed bracket iron sheet, waterproof performance, long-term maintenance, even in extreme weather can be used smoothly.