1. With an independent speed regulator, easy to switch to fast or slow speed according to your needs, the plug-in power supply can convert high speed to torque and no stall. 2. Aluminum alloy shell and finely polished, just like a small flashlight, portable and lightweight. Premium aluminum body is good for efficient heat dissipation, no worry about overheating. Good design makes it extremely quiet and smooth with low vibration during foot care. 3. The replaceable sandpaper disc made of volcanic stone-like material, easy and gentle removal of sole cutin, dead skin, calluses and so on, for salon and family, for men and women, for the elderly who wear high heels. 4. Family members can share an electric foot callus remover. And you can use a separate sanding pad, which is clean, safe and hygienic to prevent cross-infection. 5. You can use it yourself or as a gift for family or friends.