Specifications: Type: Professional Electric Nail Drill Kit Working speed: 10W Battery voltage: 3.7V Battery capacity: 300MA Charging Time: 30 minutes 80%, 60 minutes 100% Charging specification: Type-C USB Adapted Drill Bit Diameter: 3/32"(2.35mm) Drill Bit Port Depth: 1"(25mm) Speed: 5000-10000-18000RPM Feature: Upgraded Battery and Motor: Our factory has upgraded the battery and motor, which can last longer and more stable, If you have any problems with the product, please contact us immediately, we will give you a satisfactory reply.Electric nail drill is suitable for most nail polishing heads,it is convenient to unload about 3 minutes. it is multi-functional for easily grinding, polishing, removing gel polish and cuticles for both acrylic nails and natural nails. Rechargeable and Cordless: Nail polishing pen built in Rechargeable lithium battery, Being fully charged for about 1-2 hours, the electric nail file will work up to 1-2 hours. 3 Levels Of Battery Display, You can see how much battery left and when to charge. It can work while charging by power bank and usb adapter. 3 Speeds and Overload Protector: 3 levels of speed display and 4 overload protector display, if used much strength, the device will stop to work.It makes this electric nail file easier and safer to smooth your nails. Portable & Compact Design: Professional high-tech speed bearing and motor, It makes the electric file low heat, low noise, and low vibration. This Nail drill machine made of high-quality metal, tiny and lightweight design, easy to handle and carry it anywhere.It is compact enough to pack into your traveling bag or case. Professional Nail Drill Set: Comes with 1pc hight quality 3/32ceramic nail drill, 6pcs different shank drill bits and 6Pcs sanding bands.It is professional for both home, salon, and school use.