1Rechargeable design: builtin 7500mAh largecapacity integrated battery, which can work for up to 24 hours on a single charge. 2The handle adopts metal material, suitable for mold cutting, engraving, denture grinding, nail polish, nail polish removal, dead skin removal, rhinestones removal, etc. 3Adjustable 030000rpm, forward and reverse rotation direction makes you feel easy to use left and right hands for nail grinding. 4Environmentally friendly material, ABS does not accumulate heat, and will not be hot after longterm use. The machine is convenient to carry, and can be put in a bag, etc. It is exquisite, highend and elegant, comfortable to hold. 5Digital display design: it can display the rotating speed and battery capacity status, clearly knowing the running status of the machine.