Wolo 837-860 Train Horn Cannon Ball Express Pro Plus- Powerful Train Horn Three (3) Trumpets Brass Triple Chrome Plated With 12-Volt Electric Solenoid Valve And High Pressure Air System

• 12-Volt Solenoid/ 152 Decibels- 307/347/440 Hz.
• All metal horn with three (3) triple chrome plated trumpets.
• Gives any truck a true train horn sound.
• Comes with mounting hardware and 10 ft. of nylon high-pressure hose.
• Heavy-duty compressor 3.5 CFM easily fills 5 gallon storage tank.
• Built in pressure switch, on- 80 PSI and off- 110 PSI.
• Compressor can be mounted on top of vehicle or on flat surface.
• Also includes safety pressure release valve, pressure gauge, all brass fittings and petcock water drain.