Technology parameter: power supply: AC220V/50HZ Nitrogen Concentration: 95-99.5% Production Capability: 4200L/h Output Nitrogen Pressure: 8.5kgf/cm2 Input Air Pressure: 9.5kgf/cm2 Tank: 130L(Built-in) Air Extraction/Nitrogen Inflation Auto Extraction System Auto Inflation System Precision: +-0.01kgf/cm2 Dimension: 74X54X140cm USE: Cars, Light-Trucks, Minibuses Color: RED or BLUE. REMARKS: 1 Could be customized as additional gasholder. 2 Simply by pressing a buttom you can finish tire vacuuming and nitrogen inflating. The inflation will stop automatically when the tire reaches preset pressure. It is accurate and convenient. 3 There are two nitrogen outlets in the equipment, one is for automatic inflation and one is for manual inflation. so it can inflate two tires at the same time.