Features: 2 Speeds AdjustableThis electric pedicure callus remover has 2 speeds adjustable. 1700 RPM/min and 2000 RPM/min, low speed is suitable for daily care or skin with less calluses, high speed is suitable for feet with severe calluses or dead skin. You can complete speed switching by pressing the touch button. Battery DisplayHigh quality 1200mah large capacity lithium battery has overcharge protection, you can see how much battery left and when to charge. After using it, please turn it off. Please clean the product in time after using it. Waterproof DesignThe electric foot file has waterproof design, whole body can be rinsed under running water. However, do not immerse the charging cable in water or other liquids, or rinse under the tap. Separate the hand-held part from the power cord before washing the hand-held part in the water. 3 Quartz Roller HeadsElectric feet callus remover has 3 different roller heads. Light Callus Roller suitable for daily foot care, Regular Callus Roller suitable for non serious dead skin and calluses.Heavy Callus Roller suit for stubborn horny dead skin, You can choose suitable roller head according to the situation of your foot. USB chargingNo need to replace batteries. Simply recharge the cordless electric foot file with the supplied USB charging cable until fully charged. Specifications: Type: Electric Callus Remover Material: ABS Battery: Lithium Energy: 1200mah Input Voltage: 5V Input Power: 3w Charging: USB Charging time: about 1.5 - 2 hours Use time: about 150 minutes Roller Speed: 1700/2000RPM Package includes 1 x Electric Foot File Set