Efficient Removal of Callus: Pressing the button once, the roller heads automatically rotate 360 degrees at a high speed to efficiently remove foot heal cracked, dry, hard dead, and thick skin to rejuvenate your foot. It is easier to use than rasps and others. Strong Motor and 3 Heads: The electric foot file has three replacement roller heads with different roughness. One fine roller for daily foot care; one regular roller for dead skin; one coarse roller for troublesome crack callus. Two types of speed adjustment, 1700x/min low speed for delicate skin, and 2000x/min high speed for hard skin. Fast Charging and LCD Display: The foot file has a built-in 1200mah rechargeable battery. The hard skin remover can be used wirelessly for 90 minutes after 3 hours of full charge, supporting corded and cordless use. The LCD helps you know easily how much battery left and when to charge. Waterproof and Ergonomic Design: Certified IPX7 waterproof, the pedicure tools machine can be used wet or dry, you can safely use it in the bathroom. With special ergonomic non-slip design, it is comfortable to grip. You don't have to worry about dropping. The compact design makes it easy to carry around. What You Get: Electronic foot file*1, roller heads*3, USB cord*1. Guaranteed with a 2-month warranty. In case any broken problem happens, contact us to solve the problem.