Extra-Large Wrap -176 powerful LED light therap-y lights, wider area for better and whole cover phototherapy on knee, elbow, thigh, calf and ankle. Invisible infrared lights (880 nm wavelength) penetrates to deeply in 30-40 nm, making it beneficial for bones, joints, nerves and muscles . Soft & Comfortable Use -Thick but lightweight microplush fibers offer maximum comfort for daily use. Adjustable velcro straps help the light phototherapy system fit around the target area, which is hand-freely and focus on therap-y in office or at home. Safe Solution -This safety light therap-y device shows no negative side effect on people. 660nm red light can reach the deep layes of the skin to promote the circulation. 880nm infrared light is deeply penetrating for joints and muscles to deeply reach your knee. It helps speed up soreness relax and recovery, great for sport injuries, joint soreness and muscle relax. Red & Infrared Light Device -Designed for soreness relax, injury recovery and muscle relaxation, work with auto shut-off for 20 minutes, a time controller is also ready for customizing use. This device can be used multiple times per day, and it is safe for all skin types. Using friendly -It features an all new integrated digital control and 20-min auto shut off timer system. Our red light therap-y device work with many doctors who use them on athletes. And it shows good results on muscle soreness relax and promotes recovery for the knee and elbow! It is a great red light phototherapy for knee soreness relax. Specification: Light Beads: 88pcs red lights + 88pcs IR lights Material: 75% Neoprene + 25% Velvet Wavelength: 660nm + 880nm Light Beads Craft: LED DIP Bulb Temperature: Max 104℉ Light Beads Craft: SMD Bulb Frequency:50/60Hz Note: Color difference between the real object and the picture is normal. If you have any quetions, you can contact us! 2-5 Fast delivery, Free lifetime replacement parts, 1 year warranty!