I.B.N Electric Callus Remover Features: ADJUSTABLE SPEED: This electric callus remover is compact, stylish, well-made and powerful. Its speed (0-1200rpm) can be adjusted by the controller, we can adjust various speeds, removing dead hard skin from feet is more convenient.NOT BATTERY-POWERED: Unlike traditional rechargeable foot files, this FCR-2 electric callus remover is outlet-powered, not battery-powered. When we intend to use it, plug it into the outlet and use it right away.REPLACEABLE SAND PAPER DISC: Comes with 60 self-adhesive sandpaper discs, made of high quality sandpaper particles, durable and sticky.1 person 1 sandpaper, easy to replace.EASY TO USE: The electric foot file can be adjusted to various speeds so it is easy to control and safe. It's not fast, but it effectively removes dead skin without removing too much skin or healthy skin. (Please note this electric foot file is only for normal dead skin hard skin, not recommended for serious calluses.)SAFETY PROTECTION: If too much pressure is applied, electric callus remover will not rotate. This is for our own safety and to prevent too much skin removal. (Tips for use: when using it, apply the right amount of pressure to ensure that the machine will rotate properly.) Questions and Answers: Why Doesn't the Machine Feel Fast?The speed range of this foot grinder is 0-1200rpm, this speed is easy to control and does not remove healthy skin, making it safer to use.Is This Electric Foot File Battery Operated?This electric foot file is not battery operated, so you don't have to worry about low battery! When you want to use it, plug it into the outlet and it's immediately available.What Should I Do if the Electric Callus Remover Does Not Start?Sometimes the adapter is loose or the interface is dirty, please clean and reconnect the machine to solve the problem.What if the Metal Disk of the Machine Falls Off?Because the disk is removable, if it falls off, tighten it counterclockwise to solve the problem.What Should I Do if the Electric Foot File Does Not Rotate During Use?Please apply appropriate pressure to the machine, and the machine will rotate normally.To prevent removing too much skin, if too much pressure is applied, the machine will stop rotating.How Do I Clean the Electric Foot File?The machine is not waterproof, please do not wash it, we recommend using a damp cloth to clean it.