Upgraded Black Electric Foot Grinder — Clear, Practical Features and Uses Key benefits Increased rotating speed for faster results: upgraded black model reaches a maximum speed of 1000 r/min, making it more effective on thicker dead skin than the previous pink version. Multi speed control for tailored use: adjustable speed controller lets you choose the level that feels comfortable and effective for your feet. Saves time and effort: higher speed and efficient sanding discs reduce the time needed for routine foot maintenance. Main features Rotating speed upgrade: maximum 1000 r/min for stronger sanding power. Multi speed adjustable: easily set different speed levels with the speed controller. Intended use limitation: this electric foot grinder is designed for normal foot dead skin. NOT FOR calluses! Compatibility: suitable for most adults, including people who often wear heels, middle aged and elderly users, sports enthusiasts, and those who stand for long periods at work. Replaceable sanding discs (package details) Total 60 replaceable sandpaper discs per box: 30 discs of 80 grit and 30 discs of 100 grit. 80 grit discs: suitable for sanding thicker and aged dead skin areas. 100 grit discs: suitable for removing slight dead skin and common foot calluses and for daily foot care. Practical use scenarios After a long day on your feet at work: use a lower speed setting to gently smooth normal dead skin on heels and soles. Before wearing open shoes or sandals: use the 100 grit disc at a suitable speed to refine and soften areas with mild buildup. Postactivity foot care for athletes: address roughened skin on the feet with the upgraded unit and select the grit and speed that match the condition. Notes and safe use reminders Follow the speed and grit guidance to match the condition of your skin. This device is intended for normal dead skin only. NOT FOR calluses! Do not apply excessive pressure; let the rotating disc do the work. Inspect skin frequently during use and stop if irritation occurs. This description reflects the product specifications, functions, and included sanding disc quantities.