I.B.N FCR-1 Electric Callus Remover for Feet: ADJUSTABLE SPEED: It doesn't have a preset fixed speed, so that you can freely adjust the speed of this electric foot callus remover, fast or slow, it's up to you.NO BATTERY OPERATED FOOT SANDER: This electric foot sander doesn't use batteries, so you don't have to worry about low battery. It's easy to use, just plug it into an outlet, turn on the switch, adjust the speed, and you can use electric feet callus remover right away.SAFE AND EASY TO USE: The electric callus remover for feet is slow (0-500rpm) but it has a lot of torque, it won't stop easily unless you apply a lot of pressure. It slowly rotates in 360 degrees to remove dead skin from your feet without harming healthy skin, easy to use and maneuver and will not harm your feet easily.APPLICABLE SCOPE: This This electric foot sander is only suitable for daily dead hard dry skin removal, not for serious thick calluses corn. COMES WITH 60 SELF-ADHESIVE sandpaper disks that are replaceable, easy to paste and remove, 1 person 1 sandpaper, clean and good.SMOOTH AND QUIET OPERATION: Our electric foot file is made with an excellent motor that is quiet when using it. The body of the foot grinder is a smooth aluminum alloy shell that looks great, compact and light weight, comfortable to hold. FAQ, TROUBLESHOOTING STEPS Why Is the Electric Foot File Slow?Even though it's not fast (0-500rpm), it has a lot of torque (power) and is easy to control and removes dead skin without harming the skin.Is This Electric Foot File Battery Operated?The electric foot callus remover 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.