1.Elegant appearance style,simple elegant modeling,high quality and low price 2.lnput voltage rage:AC110-120V,220-240V,50/60HZ 3.Output voltage rage:DC 2-15V/18V,continuously adjustable 4.Maximum rotation speed:35000RPM 5.On/off by hand or foot pedal. 6.Available forward and reverss switch. 7.Safety conflguration for over -voltage and over-load.