Adjustable speed: 0-35000 RPM. The powerful motor allows this machine to work with adjustable speed from 0 to 35000. The smart LCD display shows the precise figure of rotation and the battery in real time. Rotating forwards and backwards: the Rotation direction design is original, which allows it to rotate in both positive and negative directions. It is more convenient for left-handers as well as right-handers. Lightweight Handpiece: The handpiece is made of aluminum alloy. It produces low noise, vibration and disperses heat quickly while working due to this high quality material. Lightweight: This nail sander is lightweight with a handpiece holder. Its small size resembles a smartphone. Just put it in your handbag to carry it everywhere. Multiple functions: this machine is equipped with 6 bits of different shapes and 6 sanding bands. These tips can help you file gel nails, acrylic nails or natural nails.