Instructions for use! This electric foot scrubber is not rechargeable and AA batteries are not included in the set! Please prepare 4 AA batteries before use. Open the battery compartment and carefully check the battery polarity. Insert the batteries with the positive (convex) side facing the negative (flat) side. After installing the batteries, cover the battery compartment and turn the ring power supply clockwise to the "I" position (the ring power supply is located above the handle). After use, turn the ring power supply off and turn it to the "" position. Replaceable rollers: The heel scraper is specially designed for cracked heels, which is convenient for foot care, and the roller replacement is quick and easy. The foot scrubber can effectively remove calluses and effectively remove dead skin Easy to clean: Press the release button on this foot exfoliating scrub to remove the roller for cleaning. The foot exfoliating scrub ensures hygienic foot care at home. Suitable for all skin types: This foot scrub glides smoothly and you can get smooth results without applying force. This foot callus remover is suitable for both men and women. Practical and Thoughtful Gift: This foot callus removal tool allows you to easily do a pedicure at home. This heavy-duty foot callus remover is a practical gift for men and women.