3 in 1 Red Blue LED Light Physiotherapy Device Infrared Light Device for Body Knee Ankle Item Type: Light Physiotherapy Device Material: Stainless Steel Battery: 1 x 18650 (one 26650 battery can be used if the battery sleeve is removed) (shipped without battery) Reflective Cup: Aluminum alloy plating reflective cup, better light effect, antioxidant layer Light source color temperature: 630+660 (red) /460 (blue) /850+900 (infrared) Introduction:Light physiotherapy is a treatment that uses red wavelengths of light, commonly used to reduce inflammation and pain and promote skin repair and regeneration. By shining light, it stimulates cells to produce more energy, which boosts metabolism and healing mechanisms. It can also speed up and lymphatic flow, which helps to remove waste products and toxins, and promotes the body's immune function. Light physiotherapy is also widely used in beauty treatments to improve skin quality and alleviate problems such as wrinkles.Uasge: Help heal the skin, reduce inflammation and relieve knee joint, relieve rheumatoid arthritis, reduce sports injuries and sprain pain, efficacy of acupuncture for wound ulcers, reduce pain from soft tissue injury