Working pressure: 0.3 MPa (4-holes); 0.25 MPa (2-holes) (Measure meter is installed at the end of air motor to measure the air pressure). Revolutions: about 22000-27000 r/min (adjustable between clockwise or counterclockwise). Noise: ≤68dB. Air consumption: about 56L/min. Ratio: 1:1. Max speed of contra angle: 25000rpm