13"x6Large Area: This wearable red light therapy device consists of an alternating array of 120 red light (660nm) and 240 invisible infrared light (850nm), a total of 360 medical infrared lights, penetrates to deeply in 30-40 mm, making it beneficial for bones, joints and deep muscle recovery problems. Multi-function: This red light therapy device can wrap your whole body including head, neck, back, shoulders, arms, knees, hands, feet to help you improve your physical condition, accelerate postoperative wound recovery, relieve soreness, Improve sleep and enhance body resistance. Pain Relief: 650nm Red Light could speed up the met-abolic rea-ction of ce-lls, reducing infla-mmation and speeding hea-ling. 850nm Near Infrared light has a particularly strong ability to could penetrate deeper into the tis-sue, or-gans, and jo-ints, to promote blo-od circul-ation. Safe and reliable no side effects. Doctor-Recommended: Many doctors recommend his customer and athletes to use this product, and it has achieved good results. This device has obtained the international certification. Now you could relieve painful joints and muscles and improve physical condition at home for a fraction of the cost.