Interchangeable and rechargeable * Place each pad in the areas marked with a square with the patterned side facing the metal stud * Remove the covers from the black side of the Gel Pads; Do not throw away since you will need them to cover your Gel Pads once the session is over * Place the beauty device around your waist and fasten securely * Consult your manual to begin your session and start on your way to a more beautiful you