360 degree rotary system for easy use, Waterproof can be used both dry and wet, Rechargeable, 2 roller heads and cleaning brush included. Easily removes unsightly calluses and makes feet rough skin smooth and soft again. It treats hard-to-reach areas without risk of injury. Designed for smoothing rough skin on the feet and heels. Keep the protective cover on your unit when it is not in use. Smooths rough skin on the feet and heels.