Kindly Reminder: 1.Do not use for children who are under 13 years old. 2.Do not use for the diabetics. 3.Do not use for poor blood circulation. 4.Don't press too hard when using.There is a current protection device inside.Press too hard will result in power off to avoid hurt feet. 5.Don't use the foot file while charging. Packing List: 1 * Rechargeable Foot File 1 * USB Cable Six Major Problems Are Solved: Cracked Heels Corn Parched Skin Thick Toe Painful Foot Calluses Cracked Skin Our foot file for hard skin can be used at home,outdoor or traveling.SPA your feet at anytime and anywhere.It's really a good experience to have a feet salon after taking a shower at night. Wonderful Gift Giving an electric callus gift to your everyday working (walking) feet,your friends,high heels women,your father and mother.They will be very happy since you are so nice. The Head Can Be Cleaned By Water After use,you can take off the head to clean,which is more convenient when next time use. Great Motor It's more powerful after we update the motor.When you clean the callus,it's also important to have a strong motor to use. Keep Healthy Regular replacement of roller heads avoid bacterial infections,it make your feet much more healthier and safer when you enjoy pedicure.