Portable & lightweight. Thermally protected. Low noise. Auto stop. Pressure-adjustable. Specifications:Type:Membrane compressorPower:1/4HPSpeed/min:1450,220~240V/50HZ;1700,110V ... .W.(KG):27.6/29.6Advantage:high flow,no air pollution,long life,pass more than 1000hours continuous test oil-free air compressor