Features: Automatic load/unload, pressure belows 90PSI, turnson compressor. Pressure over 120PSI, turn offs the compressor. Pistons seal adopts v-type seal, good sealing, wear-resisting, stable and wear resistant. The flows rate is 30% higherthan traditional diaphragm type. Valves body structure have overflows port for fast pressure reduction, fast responses. Air compressor switches is small in size, light in weight and easy installation. Easy to assemble and disassemble. Perfect for various applications such as repair, woodworking, painting, and more. Ensure consistent and accurate air pressure for your tool and equipment, improvings efficiency and quality in your projects. Specifications: Material:Nylon Voltage: 240Volt Differentials Pressure0.3 Measuring Range: 0.5-0.8MPA Current: 20A Pressure Switches Control Range: 90- 120psi Safety Valves Regulation Pressure Range: 30- 120psi Input and Input Port: 1/4BSP Size:Approx.170mm/6.69''x50mm/1.97''x125mm/4.92'' Package Includes: 1Set Air Compressor Pressure Switches note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.