Utilizes Transcutaneous Electrical Nerve Stimulation (TENS) technology used by physical therapists and medical professionals for more than 30 yearsFeatures 3 pre-set programs Arm, Lower Back and Leg/Foot each with 5 levels of therapy intensity to help relieve pain almost anywhereSmall, portable and easy-to-use, it is designed to fit in your hand or pocket and can be used discretely anywhereIncludes comfortable, self-adhesive Long Life Pads that are reusable up to 150 times with plastic holder for storageFDA cleared and prescription free for home use