This therap-y wrap contains 60 powerful light bulbs which has both 660 nm red and 880 nm infrared light chips. Red light reaches deep layers of the skin stimulates cellular repair and increases circulation to promote a more vibrant youthful complexion. IR light deeply penetrates and cause thermal effects to increase tissue temperature promote blood circulation enhance metabolism. Specifically designed therap-y wrap targeting for your knee ankle elbow joints relie-f. With 20.4 long straps it can be easily wrap on your pai-n area with more focused therap-y. This Red Light Device helps speed up joint recover-y and alleviates discomfort is great Safe & Natural Solution for sports injuries sprains joint pai-n and muscle fatigue relaxation.