Transcutaneous Electrical Nerve Stimulation (TENS) technology ; Relieves multiple body pains ; Portable design; 3 preset pain programs--arm/shoulder, lower back & leg/foot; 2 massage modes--knead & steady; 10 levels of intensity for the right amount of relief; Ideal for sharing with family members; 100% drug-free; Auto shutoff ; Includes unit, electrode cords, 2 long-life pads, pad holder, 2 AA batteries, instruction manual & quick-start guide;