Packing List: LED Light Pad × 1pc DC Cord × 1pc Power Adapter × 1pc Timer controller × 1pc Material: 75% Neoprene + 25% Velvet the soft and comfortable fibers provide maximum comfort for the user. Newest Red Light Therap-y Knee Device: This red light therap - y for knee has SMD Newest Technology that one square light including three light sources (2*660nm Red light & 1*880nm infrared light) makes the light therap-y more intensive and effective. And it is softer and flatter for therap-y using. Effective Therap-y: This knee infrared light therap - y is made of 120pcs 660 wavelengths red lights and 60pcs 880 wavelengths near-infrared lights. The red & infrared lights are distributed around the joints to effectively reduce the knee or elbow soreness and relax the muscle. Red & Infrared Light Therap-y: Our Led light therap- y for knee has 2 wavelengths lights. 660nm red light can reach the deep layes of the skin to stimulates cellular repair and promote the circylation. 880nm infrared light is deeply penetrating for joints and muscles to deeply reach your knee and help you relax muscle reduce soreness and improve recovery. Safe Solution: Our infrared light therap-y knee pad is recommended by doctor that is safe. Designed for soreness sooth muscle