The foot grinder has 2 speeds as well as an emery pad and a damping pad. It helps you get rid of unsightly calluses and keeps the area clean You will no longer have to suffer from dry and cracked heels between visits. Now, you can always have pedicure-worthy feet The high-power micro-grinders make it the best foot scrub. It spins at over 2000 rpm to remove calluses and polish the skin Common foot files can scratch and damage the skin, causing pain and discomfort. It removes uncomfortable calluses and softens cracked heels without damaging your feet Specifications: Product: Foot Grinder Material: Plastic Voltage: 3.7V Power: 5W Battery capacity: 220mAh Size: 175*155*75mm/6.89*6.1*2.95" Package included: 1 x Foot Grinder 2 x Grinding Heads 1 x USB Charging Cable 1 x Brush 1 x Sponge Ring 1 x English User Manual