great little device [SEP] i love this machine have of them take easy proceed gradually remember to replace the blades when they become dull edit the powder from your callous builds up in a cup under the rotary n u have to easily take apart each time n blow it out or shake it etc i purchase more when the came down in price i love these things much more than amope that is sand paper roll going around but these have such a good blade u have to use it responsibly or u can cut your feet but so effective if used properly go slow as some people have mentioned n be persistent a couple times a week go over your feet for a few minutes my feet were like that gentlemens i too was on my feet up to hours a day my feet cracked n bleed the best moisturizer on market right now i think is curel hydratherapy i have asked derms at work n they usually say curel vanicream is excellent but i find it too greasy after using this device hydrate your feet n place cotton stockings on do this at bedtime too if it is really bad i love this product im sorry if some of u have had mechanical problems i have used of mine n i had one problem w the wire getting broken inside i called the company n they sent out a new wire immediately my feet are silky smooth what a mess they were years ago to joe are u reviewing the correct product i have of these because i loved them so much n never wanted to be without n u r describing this device incorrectly you do no charge this unit it comes with an electrical cord like an iron n that provides electricity power there is no charging i have had the models n the last for sale models n i think i r reviewing a different device another edit the customer who said this is not supposed to be an electric sander is correct yes it stops if too much pressure it is suppose to another customer said the blade was not rough enuf yes eventually u will need to replace blades but metal against skin should last quite awhile i bought several blades when they came down in price the customers that do not like it seem to be using it incorrectly from the start n misunderstanding the mechanics of it it is really great n sad amazon is not selling it right now i have gotten so many people on this device