Improving Mount And Blade Performance I Saw An Article For A Device That Improves Fuel Economy It Mounts On Your Dash And Looks Like A Radar Detecor

I saw an article for a device that improves fuel economy it mounts on your dash and looks like a radar detecor - improving mount and blade performance

It is light green, yellow and red. If you brake hard or accelerate the lights from green to yellow to red. No cable or direct connection to your car. Has anyone seen or knows anyth about this article?