I don’t know, but at 5 or 6, do you walk anywhere? I don’t want to intrude, but to a restroom? Or wherever. If I do that, I unplug my phone and carry it with me and back. And then replug it. The HR keeps on and shows after alarm dismissal. But sometimes, if I just leave it behind next to the bed, the Bluetooth connection cuts out, and is lost. I use a BTLE optical sensor armband. I no longer believe the claims of 100 feet from your phone. The phone still needs to be close and with no obstructions. It would be nice if the app had a way to refresh the connection while it’s still tracking. But that’s not the case. Hope this helps.