[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 would effectively solve the problem of growing on the interstices and protect the health of your feet. [Durable 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.