For years, NASA has utilized this revolutionary Deep Penetrating LED Technology to promote healing of wounds and tissue growth in astronauts. Now that same fast-healing technology is available in this safe, easy-to-use Flex Wrap! Rather than just warming the skin's surface like heating pads and lesser LED technologies, the 60 medical-grade red and infrared LEDs emit photon energy to deeply permeate the skin and tissues — up to 2" deep! Light therapy decreases painful inflammation and increases blood circulation to promote tissue repair and recovery. Flex Wrap's LEDs are mounted on a flexible circuit board within a breathable neoprene pad so it's perfect to relieve pain, inflammation and arthritis in the back, knees, neck, shoulders, elbows and more. Lightweight wrap fits comfortably with 2 hook and loop straps — effectively treats areas up to 8" x 5" completely pain-free, non-invasive, with no side effects and fast results! FDA cleared Class II OTC Medical Device. USB plug for power from wall outlet/automobile adapter. One year warranty.