I have one called "Fi". Works with your phone. Seems to work great but I don't use it that often. When I think there might be an issue I'll swap the regular collar out for it. If the dog was off lead I'd always have it on.
It has an alert and light on the collar so it can act as something of a beacon. It also counts how many steps your dog has taken and how far it has gone (no guarantees about accuracy).
Thanks for the article on Dog Genome Project - I found it very interesting. I was trying to figure out the interactive Genome wheel. It has the basenji closely related to the Azawakh and rat terrier but I’m still trying to figure out the first wheel which has the basenji listed w/ black/grey starting point. As far as the PBS Dog Tales video - it’s very interesting - it’s season 47 episode 2 - I highly recommend you watch the whole thing (54 minutes).