Inserting a battery 1) Open the battery cover. 2) Insert two AA alkaline batteries.(As shown in the battery figure inside the product) 　Caution Do not reverse the polarities of the battery. 3) Close the battery cover. 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. 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. 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.