Portable Compact E FileFeatures:Durable Aluminum Alloy Material with UV Surface Treatment HD Display Rotary Speed & Battery Capacity Coreless Motor Technology with Strong Power High Torque 35,000 RPM Ultra Smooth Coreless motor, Quiet and Vibration Free 8-10 Hours Battery Life after 3 Hours Full Charge Smart Play/Pause Control for easy use Variable Speed Control Forward/Reverse Switch Smart Safety Overload Protection Metal Belt at the back Compact Light Weight for easy to carry Auto Switching 110/220V Volts