REPLACEABLE SANDPAPER DISCS: This electric foot file includes 60pcs self-adhesive replacement pads, one person one sanding pad, avoid bacterial infection, safe &; hygienic! SPEED ADJUSTABLE: This foot file hard skin remover machine has independent speed controller, so you can easily to control its speed as your request, fast or slow, more convenient. NO NEED BATTERY: different from traditional pedicure foot file, this device is not battery operated (just plug into a socket and you can use it immediately), no need worry about low battery again! ADOPT POWERFUL MOTOR, 360 degree rotating to remove foot heel cracked, dry, dead skin, calluses. (PLEASE NOTE: BEFORE USING MACHINE, WE NEED TO SOAK OUR FOOT FOR 20-30 MINUTES WITH WARM WATER, TO SOFTEN FEET DEAD SKIN.) COMPACT &; PORTABLE: This foot file callus remover machine is just like a small flashlight, portable and lightweight, with nice polished alloy surface, looks more beautiful and elegant.