Features: 1.Removable battery: Easy to use, can install 4 Pcs AAA batteries(not include batteries), USB can be used ,more powerful. 2.Two power supply modes: battery or USB cable is plugged into the power supply, which is more convenient. 3.One-button switch: One key switch. 4.Efficient Heat Dissipation: Premium body is good for efficient heat dissipation, no worry about overheat.Great design makes it extremely quiet and smooth with low vibration when doing foot skin care. 5.Quartz frosted grinding head: Strong grinding head, quick callus removal, gentle peeling, easy and comfortable without hurting feet 6.Two kinds of grinding heads Exchangeable: Rough grinding head is suitable for old dry cracked skin of heel,Fine grinding head for daily nursing. 7.Detachable grinding head: After use, the grinding head can be detachced leaned immediately.It can effectively solve the problem of dandruff residue, and protect your health. Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Specification: Function: Foot Grinder Material:Plastic Size: 11cmx7.5cm Package List: 1x Electric foot grinder