Features:- There are 3 interchangeable grinding heads to switch from, the coarse grinding head for stubborn calluses, medium grinding head for rough, dead skin, fine grinding head for daily skin care. You can choose the appropriate replacement head to meet your demands.- With 2 speeds adjustable, 1900rpm and 2200rpm, powerful and convenient. Low speed is suitable for mild dead skin or sensitive skin care. High speed is suitable for stubborn thick callus or deep cleansing. Professional equipment will help keep your heels and feet soft, smooth, and healthy- With a rotating planetary gear, it can grind calluses more effectively in larger areas. A specially designed vacuum function can suck in tiny skin calluses and keep them from flying around. The holes in the grinding heads also help dissipate heat and ensure that the devices are not burned out by the heat generated during work.- USB rechargeable, built-in 1500mAh battery, it takes 2-2.5 hours to finish charging and you can use it for continous work for about 100-150 minutes. With the LCD display, you can see exactly the remaining battery level. Thanks to the wireless design, you can use the electric callus remover on the go.- Waterproof and washable, no worry about water, you can use it even at bathing. All parts of the foot care device can be rinsed under running water.Specifications:Color: As shown Material: ABS Grinding Heads: 3 Different Grinding Heads (coarse grinding head/ medium grinding head/ fine grinding head) Power: 6W Battery Capacity: 1500mAh Charging Time: 2-2.5 hours Usage Time: 100-150 minutes High Speed: 2200 rpm Low Speed: 1900 rpm Package included:1 x Electric Callus Remover 3 x Grinding Heads(Coarse/medium/fine) 1 x Grinding Head Clip 1 x Protective Cover 1 x Cleaning Brush 1 x USB Cable 1 x User Manual