Review title is lectric Foot Callus Remover Kit, Wonder4 Rechargeable Callous Removers 3 in 1 Grinding Heads [SEP] Charged it, works pretty well although a little slow to remove skin. Wish the coarseness was a little bit higher. Switching the heads around takes a little bit of finesse but if you pull down the unlock lever and wiggle the heads back forth you are able to change them around as needed. The motor could be a little bit more powerful as it does get a little bogged down as its working but it does still perform.