Note: Keep the nail surface dry and clean before polishing, select the appropriate drill bit, and adjust the machine to the appropriate direction and speed How to use: 1. Insert the nail drill bit 2. Insert the adapter 3. Plug the USB cable into the mobile power supply 4. Select the rotation direction and speed 5. Start polishing nails Packing list : Nail drill*1, power cord*1, polishing head set*2, manual*1 Packaging size : 7.68 x 4.45 x 2.09 inches Packaging weight: 9.2 ouncesExquisite appearance: Aluminum alloy body, easy to hold, light weight, non-slip, scratch-resistant, elegant appearance, also a good gift choice. Portable and Easy to Use: Adjustable speed 0-20,000rpm and F/R direction function, only one control button, equipped with a USB charging cable, just plug in the USB cable and turn on the power to start the nail salon. Powerful Function: It can easily help you manicure and pedicure, suitable for natural nails and artificial nails, allowing you to easily care for your nails. Powerful Core: With a powerful and quiet motor and intelligent heat dissipation function, it keeps the machine low heat, low noise and low vibration when in use, and you can use it anywhere without disturbing anyone. Professional Nail Drill: An upgraded version of the 11 in 1 nail file. The kit includes 1 nail drill, 6 grinding heads, 5 polishing heads, 6 sanding belts, 1 USB cable and 1 usage guide, so even if you are a beginner, you can easily master the use method.