EFFECTIVE ELECTRIC FOOT FILE FOR HARD SKIN REMOVAL: The electric foot file has adjustable speed (0-500 rpm), it can effectively remove normal dead, hard, dry skin from the feet, does not work on severe or thick calluses.....NOTE: The foot file packaging is sealed. If the seal is broken, please contact the seller and we will arrange a new replacement machine for you. ADJUSTABLE SPEED (0-500 rpm): The adjustable speed function is very important, you can adjust it according to your comfort level to ensure a gentle and effective callus removal.....NOTE: This is not fast, but safe and easy to use. Apply the correct pressure when using the foot file to ensure it can rotate correctly. REPLACEABLE SANDPAPER SHEETS: With 60 sandpaper sheets included, you don't have to worry about running out of them at any time. Effective, adjustable and easy to use. The electric foot file for callus removal is the perfect tool for anyone who wants to keep their feet soft and free from calluses....Note: The foot file's metal sandpaper tray is removable. If it is loose, tighten it. NOT BATTERY OPERATED: The electric foot file for callus removal does not use batteries, so you don't have to worry about low battery. When you want to use it, plug it into an electrical outlet and you can use it immediately.....NOTE: This foot file is not cordless, and you must keep it plugged in when using it. DURABLE, USEFUL AND STYLISH: Beautiful polished aluminum alloy shell, ergonomic handle design, comfortable to hold and use, it is not only effective but also easy to carry......NOTE: When using the machine, apply the correct amount of force to the electric foot file for callus removal to ensure it can rotate correctly. It is forbidden to apply too much pressure, otherwise the machine will not rotate and will be damaged.