Polishing Engine Power:0,75 KW 1 HP Vacuum Engine Power:0,37 KW 1/2 HP Vacuum Suction Power:4500m3/H Engine Speed:2800 RPM Max Brush Diameter:270mm Dimensions:(LxWxH) 1245x1120x1200mm Power supply voltage:220V / 50 Hz Weight:170 Kg The human number work:2