Marine Air Horn Electric Length (in) 17 Width (in) 7 Height (in) 3-3/4 Material Brass Finish Chrome Plated Bracket Mount Mounting Decibels (dB) 121 Pressure (PSI) 10 to 12 16 Amps Voltage 12VDC For Use On Boat and Marine Application Includes Compressor Hose 30A Relay Mounting Hardware