150 PSI max, for maximum air horn performance.

Construction: 2-pc tank and compressor system
Compressor length: 6 in.
Compressor width: 4.75 in.
Compressor height: 5.75 in.
Tank length: 19.25 in.
Tank width: 5 in.
Tank height: 6 in.
Max pressure: 150 PSI
Pressure switch (on/off): 110/145
Duty cycle: 15%
CFM @ 0 PSI: 1.44
AMP draw: 18
Thermal protection: Yes
Weight: 13.5 lbs