Feature:1. 2 Grinding Head: Equipped with coarse, fine grinding heads, easily remove the thick callus of the foot, suitable for different dead skins and calluses.2. 2 Gear Speed: Electric foot grinder with 2 gear speed regulation, low speed 1600 turns, high speed 1700 turns, bringing you better experience.3. USB Rechargeable: Built in 500mAh lithium battery, after 1.5 hour fast charge, the battery lasts about 50 minutes, with overvoltage protection.4. Premium Material: Electric feet callus remover is made of premium ABS material, wear resistant, high strength, removable washable and durable.5. Application: Ideal for men or women who looking for safe and professional removal of dead skin at home or travel, compact and portable.Specification:Item Type: Electric Feet Callus RemoverMaterial: ABSCharging Voltage: DC5V or 1AUse Time: 50minBattery Capacity: 500mAh lithium battery x1 (built in)Low Speed: 1600 turnsHigh Speed: 1700 turns.Package List:1 xElectric Feet Callus Remover2 x Grinding head1 x Sponge1 x Brush1 x USB Cable1 x User ManualNote:1. Do not place the product in a corrosive, humid and high temperature environment!2. Please charge according to the voltage used. Other voltages may cause fire and product damage.