Red Light Therapy For Body: UTK products use advanced red light therapy technology. It can be used on areas such as knees, elbows, legs and arms. Efficiently relieve various pains caused by sports injuries and joint aging. And accelerate blood circulation and tissue self-repair,4 in 1 LED Beads: Our red light knee pad has a total of 54 LED light beads. Each lamp bead includes 3 pcs 660nm red light + 1 pcs 850nm infrared light. You no longer need to go to an expensive spa or salon. You can perform red light body therapy at home,Tow Band Red Light: 660nm red light (visible light) can penetrate the epidermis of the skin, promote cell metabolism, and repair damaged skin. 850nm infrared light (invisible light) can penetrate deeper into skin tissue, accelerate blood circulation, relieve pain and relax muscle tension,Multifunctional: 3 Regular Modes: Red Light/Infrared Light/Red and Infrared Light mixed mode. 3 Pulse Modes: Red Light/Infrared Light Pulse/Red and Infrared Light mixed pulse mode. Various modes are easily switched. Protect your health,Great Ideal Choice: This is a red light product tailored for those in need. It can be given as a birthday, anniversary and holiday gifts to your husband/wife, loved ones, friends and colleagues. We provide a one-year Repairing, as well as thoughtful customer service support