Is the Device Accurate and Reliable?

tracking is something that that i have like this love hate relationship with, because i love data. But here, here's the problem, when we at tracking, we have a, we have twofold problem, eh, is the device accurate and reliable? And then two, the black box algorithm that takes this data,. whether it's heart right, whether its heart rate variability, whether its speed, g ps, whatever it is, tit theyr measuring. How accurate is that? How validated is that?How consistent is that at showing, you know, the, eh, the actionable item n and having it be reliable? I think at this stage,  we can talk about