1. USB type & portable size: This electric nail file comes with a standard USB port so you can connect it to any USB device such as a mobile power supply, laptop or AC adapter (input: 5V/2A). The lightweight and compact design makes it easy to use anywhere. 2. [Powerful & Adjustable Speed] 0-20,000RPM Adjustable speed and direction (clockwise and counterclockwise). This electric manicure machine is perfect for salon and home use. Professional Nail Machine Set: Nail machine set includes 6 x 3/32 inch (approx. 1.9 cm) shank drill bits, 30 sanding belts and acrylic nail clippers for all your needs to buffer, sharpen, sand, polish and buff acrylic and gel nails, trim thick natural toenails, and remove extension gel, cuticles and dead skin. 3.[Low heat & noise & vibration] This nail art machine is equipped with shock absorbing bearings, a precision motor and a cooled aluminium housing to ensure a noiseless and smooth operation with low heat. For a comfortable manicure experience. Can be used for shaping, polishing and removing acrylic gel nails for a variety of functions