Three Different Replacement Roller Heads Coarse roller head: Suitable for stubborn horny dead skin on feet. Regular roller head: Suitable for remover rough dead skin on feet. Fine roller head: Suitable for daily skin care. According to your skin condition, choose a suitable grinding head for installation. Lightly press the switch button, you can switch the appropriate speed, gently rub your feet until the dead skin falls off. Product Features: The roller head can rotate 360 degrees at high speed to remove dead skin, thick calluses, and other skin problems with your feet. Waterproof - Wet and dry use, you can enjoy the luxury of personal pedicures in the shower or bathtub. LED Power Disply - you can see how much battery left and when to charge. Pressure protection technology - if you press too hard, the device will power off to prevent any injuries. Specification: Color: Green Package Include: Electric foot file*1, Roller heads*3, Clean brush*1, USB Cable*1 Cure Most Foot Problems: Callus Dead skin Foot corn Cracked Skin Rough Heels