Hello, the Platinum Led Biomax 450 unit has probably been one of my most important purchases of my life, not in terms of money but for the immense benefits it brings to my health and well-being. I had problems with my arm joints and one shoulder, the doctors told me I should take cortisone which I always refused. The Biomax 450 unit has changed everything, working in a non-invasive way, it's the whole body receives the benefits. I don't have any pain anymore. Red light therapy is the medicine of the future accessible today. But only use the best like Platinum Led products. Take a look at Alex Fergus' analysis and comparisons on the web and you'll see that Platinum Led always comes out on top. I recently bought a Platinum Led horizontal stand rack to improve the comfort of use, so it will allow me to add a second Biomax 450 unit by the end of the year.