he extended reality SIDmill is the most innovative and valuable new running equipment since the stopwatch. It precisely replicates any terrain, from the NYC Marathon to the Great Wall of China. The super-smooth belt shifts instantly from uphill to down, conforming to the road or trail that you choose.No push-button controls: your speed and the scene on the large immersive screen change in response to hand gestures. Your unique run can be complemented by strength and flexibility training with our certified instructors.