https://www.bivacor.com/ https://www.bivacor.com/ has a good explanation and video description of the system. It sounds really promising. The things I was most

https://www.bivacor.com/ https://www.bivacor.com/ has a good explanation and video description of the system. It sounds really promising. The things I was most curious about are, it gets a charge from a battery you carry around on your person like a purse, and, it has a ten hour recharge time and comes with two batteries. I think I'd get a few more spares. I would worry about something like the battery becoming disconnected when I sleep. Hopefully it has a very insistent alarm to alert the user. I'd also worry about getting mugged and having the mugger demand the battery from me. One idea that seems cool is if you could manually control your blood flow rate. They say it does change but don't clarify if it's manual change or automatic. If it were manual, it would unlock some abilities. You could calm yourself by dialing down your heart rate or "warm up" by dialing it up. I hope this technology works!