Viking Horns V107C Heavy-Duty 150 PSI Air Compressor For Train Horns 12 Volts operational current, 9.5 amps Moisture and dust resistant. Oil-less Design With 1/4" NPT threaded braided air hose Includes inline fuse holder, and remobeable filter Please note: Air compressor will operate efficiently with up to 1.5 gallon air tanks!