Interesting find. I have not heard of this product or how it help the central nervous system, but did a little poking around. Here is the direct company site and info on the product:

The Apollo Wearable for Sleep -

- https://apolloneuro.com/

Here is a review from Harvard University:

Harvard Health Ad Watch -

- https://www.health.harvard.edu/blog/harvard-health-ad-watch-can-a-wearable-device-reduce-stress-202109222601

And, it is sold on Amazon, of course! Here is a direct link:

Amazon.com -

- https://www.amazon.com/s

@jrg200911, do you wear the Apollo Neuro device? If so, in what ways does it most help you?