Manicure Grinder Feature 1.Up to 35000RPM. Equipped with a powerful motor to generate ultra-high rotating speed while ensuring a long service life. You'll enjoy smooth manicure experience with minimized noise and vibration. 2.Simplified Operation. Adopts a smart touch screen, which displays all the information you need, and enables you to adjust each function with 1 click/twist. 3.Free Your Hands. Use the foot pedal attached to independently control the power, and youll be able to realize an uninterrupted, efficient and perfect manicure with the help of both hands. 4.360 Nail Care. 6 drill bits of different shapes are included, with which you can easily perform carving, engraving, routing, grinding, sharpening, sanding, cutting, polishing and drilling, as well as removing dead skin & callus. 5.Easy to Carry. With the help of the handle, you can lift the machine and effortlessly carried, making its operation more flexible and convenient. 6.More Humanized Designs. Built-in drill bit slots: for easier access & placement of the bits, also keeps the desk clean; independent main switch: there's no more need to waste energy pulling the plug repeatedly. How to Use 1.Press power switch to turn on machine. 2.Press rotation switch to start rotation. 3.Press hand/foot switch to switch to hand control. 4.Press forward/reverse switch to adjust direction. 5.Twist RPM knob to adjust RPM. 6.Begin to use. How to Use the Foot Pedal 1.Connect the pedal with pedal Interface. 2.Press hand/foot switch to switch to foot control. 3.Hold down the pedal to turn on/off rotation. How to Replace A Bit 1.Twist chuck handle anticlockwise to unlock the chuck. 2.Pull out the bit. 3.Insert another bit. 4.Twist chuck handle clockwise to lock the chuck. Caution 1.Do not use the product when it is plugged in, otherwise its service life may be affected. 2.Do not use or leave the product in an excessively dusty, high-heat or humid environment. 3.Take care not to drop the handpiece, as which may damage its ball bearing and weaken its durability. 4.Never allow water or other liquids to spill into the product, as which may cause short circuit, overheating or other malfunctions. 5.The product is designed for nail art (manicure/pedicure) only, and it should be operated by an authorized personnel. 6.Always check the product for looseness, vibration, and abnormal sound & temperature. If any abnormality is detected, stop operation immediately and consult your dealer. 7.The rated voltage is 110/220V.