Features: This light therapy device shows no negative side effect on people. It helps speed up joint recovery and alleviates pain Great for sport injuries,neck and shoulder stiffness, sore back, muscle pain, and tissue repair, body slimming. 200pcs powerful LED lights, 120pcs 660nm red light & 80pcs 880nm infrared lights Benefits: Reduces inflammation and swelling: In a study, the 660nm wavelength was found to reduce both inflammation and swelling by reducing the number of inflammatory cells which lead to the formation of swelling. Accelerate wound healing, diminishes scars and burns: The 660nm wavelength has been proven to increase the formation of new blood vessels and enhance collagen deposition to help in the healing of wounds. Reduces training fatigue: Nature red and infrared light helps promote antioxidants, which play a central role in reducing the oxidative stress associated with muscle fatigue. Reduces joint pain and alleviate arthritis: Red and near-infrared light has a significant effect on reducing joint pain and increasing function and activity for people with arthritis. Skin rejuvenation: The 660nm is absorbed at a higher proportion by the skin tissue, making it especially effective for boosting skin health and increasing collagen. Specifications: Model ：Red Light Infrared Therapy Belt Size ：130X18cm Color ：Black Wave Length： 660nm/850nm Function ：Body slim / Pain Relief LED number: 200pcs