1.Elegant appearance style,simple elegant modeling,high quality and low price. 2.Input voltage range: AC110V-120V,220V-240V,50HZ/60HZ for worldwide. 3.Output power supply scope:DC2-15V/18V,continuously adjustable. 4.Maximum rotation speed 35000RPM. 5.On/Off by hand or foot pedal. 6.Available forward and reverse switch. 7.Safety configuration for over-voltage and over-load.