The electric foot callus grinder pedicure tool will make your feet look clean, smooth and attractive, making you confident in sandals or flip-flops, and confidently show your soft and smooth feet! Specifications:Color: Red/ blue. Material: ABS, quartz sand. Size: 4.49 x 2.9 inches. Power supply methods: 4 AAA batteries/ USB rechargeable. Package includes: 1 x Portable electric foot grinder (battery not included). 1 x USB charging cable. Features:Two kinds of grinding heads to exchange, one is a fine grinding head for daily nursing, which is gentle and comfortable to peel and does not hurt your feet; the other is a quartz sanding grinding head, which helps sharp grinding, quickly removes calluses, gentle peeling operation. One-button switch speed, two gears adjust speed, high and low gears adjust speed and adapt to different cutin thickness. Built-in powerful motor, the grinding head rotates at a speed of 2000 RPM to achieve high performance and maximum comfort. How to use?Step 1: Select the appropriate grinding head, insert the grinding head into the device to ensure a perfect fit, and then press start. Step 2: Gently rubbing your foot till dead skin drop off. Don't apply too much pressure, this is to protect your skin. Step 3: Wipe your feet with a dry cloth or clean the dead skin, apply moisturizing cream, massage your feet slowly. Step 4: When off, roller head will be covered with dead skin. Please use brush to clear all the waste, remove the grinding head you can direct cleaning under the tap. Notice:If your foot has hard or thick calluses, do not soak your feet before using, or will make it impossible for hard skin to be effectively removed. For good results, your should keep your feet clean and dry.