Brand New!!!Extremely LoudSet includes（as the following picture show）Suitable for all 12V vehicles such as cars， ， boats etcE-MarkedWe recommend professional installation to ensure safe fitment Material: MetalColor: BlackQuantity: 1 pc3 Trumpets Lenght:17cm/23cm/29.5cmPackage size: 30.5 x 16.5 x 16 cm (LxWxH)12v Electronic Air SolenoidDB output: 150 DBRequires air compressor and tank (not included)Mounting bracket and mounting hardware Package includes:1 x Compact Triple Air HornMounting bracket and some mounting hardware