[Package List] 1x white elelctric foot file, 1xbox repacement sandpaper disk(60pcs), 1xUS plug, 1xuser manual. [Alloy Body] Nice polished craft, durable and looks more elegant, perfect gift selection. [Replaceable Sandpaper Disk] Self adhesive refill pads, you can paste on machine well, won't fall off when works. After using, change a new sandpaper disk for another people, one people one disk, sanitary and healthy. [Speed Adjustable] This electric callus remover machine has an indenpendent speed controller, you can easily adjust various speed, fast or slow is up to you. Please Note: this is home use electric foot sander is only for normal dead skin, not for thick callus, if you have serious foot issues, please go to the professional nail spa. [Not Battery Operated] Just plug it into the socket and you can use it immediately. PLEASE NOTE: This electronic foot sander is not rechargeable, so you don't need to worry low battery again.