Operating the switch 1) Off step 0: Default setting. This is used when the product is not used or it is stored. 2) Low speed operation step 1: Until you are familiar with the nozzle operation method, set the low speed for 　operation. Suitable for soft skins or finishing or fine areas. 3) High speed operation step 2: Used for hard callus areas of your foot. 　 High speed rotation and strong force to remove the callus fast. 4) Continuous operation step 3 - When the rotational force weakens during use of step 1 or 2, insert the charging 　adaptor for continuous use. 　(Step three requires use of an adaptor.) 　(If no adaptor is plugged in, it won’t operate. This is not a malfunction.) Nozzle description 1) Circular nozzle: Used for your foot bottom/side/heel. Large areas with callus. 2) Cone nozzle: Used for toes/finger nails and palm of your hands. 3) Fingernail gloss nozzle: Use to make the fingernails glossy or do the finishing works. Other part description 1) Brush: Using the cleaning brush, you can remove the callus from the nozzle protection cap and the nozzle 2) Nozzle protection cap: It collects all the callus pieces and dusts into one place. It protects the nozzle. 3) Charging adaptor: Used to charge the product or for continuous use.