Feature 1.3 Replacing the grinding heads 3 different quartz sand grinding heads. The coarse grinding head can remove stubborn dead skin, the medium grinding head can remove rough dead skin, and the fine grinding head can be used for daily care. You can choose a suitable grinding head for your skin, get rid of dead skin and hard cracked skin on your feet, and restore delicate and smooth skin on your feet. 2.2 adjustable speeds with a button 2 adjustable speeds, 1900 rpm at low speed and 2200 rpm at high speed. Low speed mode is suitable for daily care or slightly dead skin, high speed mode is suitable for stubborn calluses on the heel. Electric foot scraper would effectively solve the problem of bacteria growing on the interstices and protect the health of your feet. 3.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 1200mA battery capacity, USB charging time for 2 to 2.5 hours, it can work powerfully continuously for 80 to 100 minutes. 4.IPX7 waterproof IPX7 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, Function 1. Remove dead skin, calluses and cuticles. 2. Vacuum dust and collect dander. How to use: Press and hold the switch for 2 seconds, the default is to enter the slow gear, the green light is on, and then short press the switch. Battery type: Lithium battery 1200 mAh, continuous battery life is about 100 minutes, depending on personal usage habits and cleaning methods. This machine has a waterproof function. After the dermabrasion, the head can be washed separately, or the whole machine can be rinsed under the faucet (prolonged soaking in water is prohibited).