Seems like the Airdog has the functionality, by following a beacon worn on the subject. I just read a good and thorough review about it. https://www.kickstarte

Seems like the Airdog has the functionality, by following a beacon worn on the subject. I just read a good and thorough review about it. https://www.kickstarter.com/projects/airdog/introducing-the-adii-the-future-is-hands-free https://www.kickstarter.com/projects/airdog/introducing-the-... https://www.dcrainmaker.com/2017/07/airdog-adii-2nd-gen-sports-tracking-drone.html https://www.dcrainmaker.com/2017/07/airdog-adii-2nd-gen-spor...