specification: Item Type: Electric Feet Callus Remover_x000D_Material: ABS, Alloy_x000D_Built in Battery: Li Ion Battery 2200mAh_x000D_High Grade Speed: About 5500rpm Features: 1ALLOY MATERIAL: Electric foot callus remover adopts alloy grinding head, which can quickly remove calluses and have a longer service life. 2QUIET AND POWERFUL: Electric foot callus remover with silent design, noiseless motor, strong power, and a service life of 10 years. 3WIDELY APPLICABLE: A compact electric foot grinder ideal for men and women who want to remove dead skin safely and professionally at home. 4QUICK SWITCHING: The electric foot grinder is easy to use, just push the power button up and down to switch between different speed modes. 5MULTIPURPOSE: USB rechargeable foot file can easily tackle the dead skin on your feet or dry, cracked heels for softer skin on your feet. PackageList: 1 xElectric Feet Callus Remover 2 x Grinding Head 1 x USB Cable