1.rated power input:900watt 2.no load speed:11000rpm 3.with CE,emc,GS,UL certificate. 1.Variable speed2.Reverse switch3.Chuck exchangeable 4.More powerful, more durable5.The handle with rubber skin, long time working without worncodehp-g45710 voltage230V/50HZrated power input900wattno load speed11000rpmdia of wheel115/125mmdia of hole22mmspindle diameter14mm professional angle grinder hp-g451050