Item: Portable Drill MachineMaterial: AcrylicFull Recharge Time: 2.5 hoursContinuous Use: 4-5 hoursSpeed(RPM): 35000RPM(fastest)Life Time: 5,000 hoursItem Size(body): 14 * 7 * 3.5cm Item Weight:Approx 530gPackage List:1 * Drill Machine1 * Handpiece1 * Switching Adaptor1 * Handpiece Holder6 * Optional Bits with 6 Sanding Band How to Use1.Plug the handpiece into the DC out socket on the main control machine.2.Plug the plug of main machine into appropriate power socket3.Insert the bit to the collet of the handpiece directly.Pls refer to the Six Bits' use.6pcs nail drill bits function:Nail polish,Remove UV Gel nail,Acrylic nail3pcs Metal grinding head bits:gringding coarsely,shaping and exfollating3pcs Grinding wheel hesd bits:finely grinding hyponychium,nail edges4.Choose the mode "F"(FORWARD) or "R" (REVERSE) direction5.Adjust the speed level that you need by sliding the speed control knob