LED Power Display & Rechargeable Electric Foot File --- With high quality 1500mAh large capacity lithium battery, the callus remover can work for 150 minutes while charging for about 2-2.5 hours. With the LED display function,you can see how much battery left and when to charge the foot scraper.3 Replace Grinding Head --- The feet hard skin remover has 3 different quartz sand grinding heads: The rough grinding head is for removing stubborn horny dead skin , the medium grinding head is for rough dead skin, the fine grinding head is for daily care. This pedicure set pampers your feet with spa-like pedicure in the comfort of your home, ideal for for men & women who looking for safe and professional removal of dead skin at home.Easy to Use --- With 2 speeds adjustable design, the foot care pedicure kit can be easily control the fast or slow. The electric foot files for hard skin has powerful VACUUM ABSORPTION to remove most callous dust for clean air and floor.IPX7 Waterproof --- With IPX7 waterproof design, the pedicure tools can be rinsed under running water. This electric foot files for hard skin is suitable for wet and dry use, and the foot file will protect your foot health. Please dry your feet before use for better results. (NOTE: Do not soak it in water for a long time.)Portable --- This dead skin remover for feet is small, which is convenient to carry to everywhere. Electric foot grinder would effectively solves the problem of bacteria growing on the gaps and protects your foot health. A special gift for your family and friends. If any problems, please kindly and we will provide you with satisfactory after-sales service