New Design: The arc shape grinding head can touch 98% skin area, it's more efficient to remover the dead skin. The principle of portable handle design is avoid the stress when the body is bent.Electric Callus Remover Built-in Vacuum: 2020 Updated electric callus remover adopt built- in vacuum design, it is able to absorb 99% of the residues of dead skin, which will be trapped in the container inside.Quartz Grinding Wheel: This callous remover for feet has 3 different quartz sand grinding heads,rough grinding head can remover stubborn horny dead skin , medium grinding head can remover rough dead skin, fine grinding head use for daily care. You can choose suitable grinding head according to the skin to care,make your feet restore the delicate and smooth skin.Safety protection device: lightly press the machine when using it. In order to prevent you from hurting your skin with excessive force, the machine is equipped with a safety protection device, and the machine will automatically stop working if excessive force.Powerful and Rechargeable: The powerfully exfoliating grinding head rotates at over 2000 rpm to easily remove calluses and rough skin in seconds. The powerful head combined with rechargeable battery and mess-busting vacuum makes it perfect for taking on the go! Built-in 1200mah large capacity lithium battery, Use the USB cable, you can charge it in the car laptop, or power bank etc.