The Electric Foot File glides over your heels and soles effortlessly, safely removing rough skin in just a few minutes. It comes with two different frosted roller heads. You can choose the appropriate pumice stone according to the hardness of the dead skin on your feet. The pumice stone can be removed by gently pressing the side of the pedicure tool, then rinsing with water for reuse. You will feel so smooth and beautiful afterwards. This electronic device is very convenient and easy to use -just press the switch button to turn it on or off. Also, with its built-in Usb, the foot file can be used for two hours on a full charge, allowing it to be reused more than 1,000 times.Product Specifications Electronic, easy to use Ergonomically designed Usb Charge, charging time 4 hours Use time 2 hours for full charge. Roller material: carborundum Rollers washable Dimensions 3.3""x3.3""x1.3"" Weighs: 4 oz