Ravifun Electric Foot Callus Remover is upgraded 2nd Generation Electric Foot File. Upgraded: It becomes faster and stronger, 360 degree rotating, more easily remove calluses.Multi-Speed Adjustable: You can easily set all kinds of speeds, fast or slow is up to you.Not Battery Operated: You just need to plug into socket and can use it at once, more convenient.Replaceable Sandpaper Pad: 1 person 1 disc, you can easily paste on the machine and remove it, perfect for family use.Stylish appearance: Aluminum alloy shell and nice polished, easy to carry when you are in travel or vacation.1 Button: Convenient to use with 1 button handle.Speed controller, easy to control fast or slow. Electronic foot callus remover is powerful yet comfortable.Easy and comfortable to use. Product Specification: Rated Voltage: DC 12 V Rated Current: 1.5 AReal Output Speed Range: 600 rpmElectronic Foot File Size: 4.56x1.69 inchElectronic Foot File Weight: 5.99 oz. Steps of Perfect Usage: Step 1 Before using, Please soak your feet in the warm water for 10-20 minutes. To soften. Step 2 Get a new sandpaper disk and tear off back adhesive protective film.Stick the sandpaper disk to the electric foot file. Step 3 Connect the device and plug into the socket.Never unplug the DC power cord when the motor is running. Please unplug the power cord when it is not at work. Step 4 Turn on switch and set suitable rotation speed.Please note that the faster the machine is, the faster the machine will generate heat, don't use it for too long each time. Step 5 Apply suitable pressure when using.to ensure the machine can rotate normally, so that the machine can effectively remove callus from the feet.Do not apply too much pressure, this will cause the machine not to rotate and cause damage to the machine. Step 6 After using, remove sandpaper disk.THIS MACHINE IS NOT WATERPROOF, PLEASE BE ATTENTION. Note The device is not wireless. Only plug into socket,the device could not work. The device could only work on the condition of when it plug into socket and turn on the switch. Never unplug the DC power cord when the motor is running. Please unplug the power cord when it is not at work.Please don't use it with highest speed for too long each time.Please don’t apply too much pressure.Be sure to unplug the product the outlet when not in using.