Whether you're suffering from tight tension-filled muscles, joint pain, carpal tunnel syndrome, muscle spasms—or just too much of a gym workout, you can help to alleviate pain and speed healing with the FDA-approved TENS Electronic Pulse Massager! Prescribed by doctors, chiropractors and physical therapists as a safe and reliable at-home pain management system, it uses electric pulses to gently stimulate nerves and muscles, blocking pain signals to the brain and aiding in the release of waste products like lactic acid to kick-start your body's normal healing process. Use the push-button LED controller to choose from 6 automatic massage programs (waist, shoulder, joint, hand/foot, sole or repeat) and 3 massage techniques. Compact and portable. Reusable electrode pads (1 /12" sq.) have a sticky back to gently but firmly attach to your skin. Pads last for 6 months. Uses 4 AAA batteries (included). Controller is 7 3/4" l x 2 1/4" w x 3/4" d.