Tens technology: Utilizes Transcutaneous Electrical Nerve Stimulation (TENS) technology used by physical therapists and chiropractors for more than 40 yearsPersonalized therapy: 3 pre-set body pain programs (Arm/Shoulder, Lower Back and Leg/Foot) and 2 massage-like modes (Knead and Steady) each with 10 adjustable levels of power intensity to help relieve muscle and joint pain almost anywherePortable tens unit muscle stimulator: Small, portable, easy-to-use, and can be used anywhere discreetlyLong life pads: Includes comfortable, self-adhesive Long Life Pads (1 pair) that are reusable up to 150 times and a plastic holder for storageSafe & effective: 100% drug-free relief for multiple body painsHow it works: Electrical nerve stimulation is applied to the surface of skin, which scientific theory suggests may block pain messages to the brain, increase blood circulation and stimulate endorphins (your body’s natural painkillers) to provide pain relief