[3 Replacing the grinding heads] 3 different quartz sand grinding heads. The coarse grinding head can remove stubborn , the medium grinding head can remove rough , and the fine grinding head can be used for daily care. You can choose a suitable grinding head for your skin, and hard cracked skin on your feet, and restore delicate and smooth skin on your feet. [2 adjustable speeds with a button] 2 adjustable speeds, Low speed mode is suitable for daily care or slightly , high speed mode is suitable for stubborn calluses on the heel. Electric foot scraper would effectively solve the problem of growing on the interstices and protect the health of your feet. [ and rechargeable] Equipped with high quality motor, safe, efficient and energy saving, it is also proven to stay much longer than others.Built-in battery, USB charging time for 2 to 2.5 hours, it can work powerfully continuously for 90 minutes. [ waterproof] waterproof body design, the whole body can be rinsed under running water. You can turn on the product and keep the grinding wheel running for 5-10 seconds when washing, which can be cleaned quickly and efficiently. size: 155 x 85 x 60mm Material: ABS colour: Black Package Contents: 1 x foot grinder 3 x grinding head 1 x data cable 1 x brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.