1Two Speed: With 2 gears of adjust speed, you can customize your foot care routine according to your needs, provide gentle exfoliation and deep callus removal. 22 Abrasive: Two kinds of abrasive particle grinding head of different thickness to solve the problem of dead skin calluses of different thicknesses on the feet. 3Dust Suction: With strong dust absorption system, foot callus remover provide dead skin and dust inhalation into the bin, no longer be troubled by flying dusts. 4Long Lasting Battery: Equipped with a built in 1500mAh lithium battery, foot callus remover offers a long operating time of 60 minutes on a single charge. 5Safe and Gentle: Foot callus removal tool with removable head, replaceable and washable for a long service life, achieve salon like foot care results.