Rtating Speed Upgrade: New upgrade black electric foot callus remover, the maximum speed can reach 1000r/min! It is an upgraded version of the pink foot grinder. If the dead skin on your feet is thicker, we strongly recommend you to use the upgraded version for better results! save time and energy! Multi-Speed Adjustable: you can easily set different levels speeds by speed controller,Please note that this electric foot grinder is only suitable for normal foot dead skin.NOT FOR calluses 60Pcs Replaceable Sandpaper: One pad per person, to avoid bacterial infection, safe and hygienic! Self-adhesive, no need glue, easy to replacement ,paste and remove. Suitable for most people: People who often wear high heels/ middle-aged and elderly/ love sports/ stand for a long time and work. Easy to Use: You just need to plug into the outlet and turn on switch, you can use it at once, no need to recharge it!