PLEASE NOTE: 1st point, this rechargeable foot file is not waterproof, please do not wash the body. The 2nd point, when using the machine, please do not apply too much pressure to prevent the machine from not rotating. PACKAGING DETAILS: 1pc Rechargeable foot callus remover-black, 1pc 1.65 inch Nano glass grinding head, 1pc small replaceable sandpaper head, 20pcs replaceable 80 grit sandpaper discs, 1pc Type-c charging cable, 1pc instruction manual. STYLISH AND EASY TO USE - Premium ABS material, fine frosted texture treatment process, non-slip and comfortable. Long press to turn on/off, short press to adjust the speed, making it easier for you to use. LARGE CAPACITY BATTERY - Equipped with 2200 mAh strictly certified lithium ternary battery with protection system, safe and secure, durable and long-lasting, a full charge to meet the normal use of 20-30 times. Other brands have a capacity of only 1200-1500 mAh, far less than ours. POWERFUL SPEED - Our electric callus remover has three speeds - 7500/12000/15000 RPM, each speed is powerful enough to meet your different needs. Better than other brands, they only offer 2 speeds. REPLACEABLE DOUBLE GRINDING HEADS - Our rechargeable foot callus remover comes with 2 grinding heads, 1 Large (1.65 inches) Nano Glass Head and 1 Small Replaceable Sandpaper Head. The Nano glass head is for direct use and can be washed. Sandpaper head need to paste the sandpaper disk (we provide 20pcs can be used for a long time), 1pcs 1 sandpaper, clean and healthy, easy to remove dead hard skin, suitable for home salon use.