Features:Super loud, chrome plated trumpets(Non-Rusting).Easy to install, no air system needed.Suitable for cars, trucks, boats, motorcycle, any 12V vehicles.Attachment screws and brackets included.Specification:Color: SilverDB output: 115dBFrequency:450HzVoltage: 12VCurrent:≤4ASpecial function: Single trumpet air hornSize: 203mm x 77mm x 61.5mm and 158mm x 70mm x 61.5mmPackage includes:1 x Trumpet Air Horn tubes1 x Air Compressor1 x Air Hose