Product Information: Foot Hard Skin Remover, which can help you have pedicure-worthy feet whenever you want Feature: Do not need the Salon, you can have pedicure-worthy feet whenever you want. You can relax yourself wherever you want. Take it in the car for sandal-ready feet at the beach or to the office to touch up cracked heels in between meetings. Effectively removing calluses while buffing and polishing skin without the damage. Parameters: Product Name: Wireless Foot Sharpener Charging Voltage: DC 5.0V Charging Current: 2A Rated Voltage: 3.7V Rated Power: 2.5W Use Time: 50 minutes Battery Capacity: 500mAh Product Weight: 130g Product Size: 10.5*6.6*5.4cm Low Speed: 1600 rpm/about (Green Light) High Speed: 1700 rpm/about (Red Light) Three Kinds of Abrasive Particles: Coarse sanding head: suitable for dry and cracked heels Fine sand grinding head: suitable for dead skin and peeling Polishing head: suitable for daily care Foot Repair Steps: 1. Soaking: wash your feet with warm water and wipe off any water stains on your feet 2. Grinding: Keep your feet dry and use a foot grinder to remove the keratin of the feet 3. Care: Apply foot cream on your feet to keep your feet skin smooth Use Tips: 1. If the calluses are thick, please use 2-3 spoons of white vinegar, soak your feet in warm water for about 10 minutes, and keep your feet dry before use. 2. Exfoliation should not be too frequent: use 1-2 times a week. It is not recommended to polish all dead skin calluses at one time. 3. Please fully charge the battery for the first use. The product will be tested before leaving the factory, and the power is only about 40%. If you feel that the power is insufficient, you need to charge it for about 4 hours for the first use.