Features: Durable and utility. Easy to install and disassemble. Help you to save energy of the air compressor. High precision voltage regulation and sensitive reaction. Equipped with an infinity port for rapid pressure reduction. Dual indicators clearly show the current pressure value. The Red Knob on the top is convenient for you to adjust at any time. Threading fits most of compressors Strong plastic shell and great performance Help you to save energy of the air compressor. Widely used in personal workshops and factories. Specifications: Material: Metal, Plastic Voltage: 220V-240V Max. Current: 20A Operating Pressure: 5-8Bars ( 71psi-113psi ) Connect Threading Size: 1/4"BSP Exhaust Pipe: 6mm Outer Diameter of Pressure Relief Port: 9.5mm Oevrall Size: 17 x 5 x 12.5cm Package Included: 1 x Air Compression Control Switch Kit