Safety certification: US FDA, RoHS, CE and FCC Size: 125*25mm Irradiance: >130 mw/cm? @1 inch 660nm red light is particularly effective in promoting skin health, activating cell mitochondria and helping to promote collagen production 850nm near-infrared (NIR) penetrate deeper into tissue cells and can pass through bone to aid in wound healing, soothe muscle pain, reduce inflammation, and improve nerve damage and joint pain. EMF: 00 @ 4 inches 1 year warranty Free shipping