Air Compressor Model: 0650 one by four to five dental chair POWER SUPPLY 220V 50Hz POWER 3?50w EXHAUST VOLUME 220L/min (0.4Mpa) NOISE 75dB MAX PRESURE 8 MPa ON/OFF PRESURE 5.5 MPa ROTATION SPEED 1400r/min AIR TANK VOLUME 90L OVERALL DIMENSION 900x420x680mm