High-end quality with low vibration and quiet noise, 30,000-35,000rpm Model NumberNS301Electrical110V/60hz & 220V/50hz; output 18VDC, 0.5A.Rotary speed30,000 rpmChuck3/32" (2.35mm)Packing12pcs/cartonG.W2.2kgColorContentBasic Bit and Sanding BandHand Piece StandFoot Pedal SwitchUser's Manual