Built-in 2000mAh rechargeable battery, can work up to 8-10 hours after fully charged for 3 hours. With an LCD smart screen, it can clearly display the speed, rotation direction and remaining power, so you can operate it as needed. Can be used for grinding, cutting, polishing, carving, and removing gel nails, cuticles, dead skin, and more. It uses a powerful motor with a maximum speed of 45,000 rpm and a high working rate. It comes with 6 grinding heads, each with different functions, suitable for a variety of scenarios. | NESTLUNE Unisex Professional Rechargeable Nail Drill File Machine in White