Features: 105-115dB super loud, clear and striking, provides powerful warning, not easy to ignore, ensure your driving safety. Microphone function, make you express clearly, deal with efficiently. 6 different sound, meet your different needs, you can choose what you want by the controller. Easy to install with necessary hardware, simple operation. Fits for most DC vehicles, such as car, motorcycle, boat, truck, tractor, van, SUV, etc. Specification: Voltage: DC Power: 30W Material: & Metal Color: Black Package Size: 11.6 * 11.6 * 11.2cm / 4.57 * 4.57 * 4.41in Package Weight: 440g / 15.51oz Package List: 1 * Speaker 1 * Controller 1 * Set of Hardware