Function: 1. 90-120PSI ADJUSTABLE: This air compressor pressure switch and valve pressure regulator support automatic control, 120PSI cut-off, 90PSI opening, adjustable air performance, adjustable air pressure in brass connector 2. ADJUST PRESSURE: Robust and durable, mainly used do adjust the initial pressure and closing pressure of air compressors. 3. RED SWITCH KNOB: With red switch knob, easy to operate. They have automatic control, automatic charging or discharging function 4. 2 INDICATORS CLEAR DISPLAY: Equipped with 2 valve pressure gauges, easy do obtain pressure value, clearly display the current pressure value 5. INDICATOR RANGE 0-180PSI: Rated voltage AC 240V/380V, rated current from 16A-20A, compressor pressure gauge display 0-180PSI Specification: Item Type: Air Compressor Pressure Valve Kit Material: plastic stal brass Rated voltage: AC 240 V/380 V Rated Current: 16A-20A Pressure Range: 90-120 PSI Compressor Pressure Gauge: 0-180 PSI Pressure switch: 2-phase port 1 List of packages: 1 x Air Compressor 2 x Valve Indicator 1 x Pressure Valve