The Pro Tracker system allows you to find game after the shot regardless of whether you saw where the animal went, if there's a blood trail, or your on your won search methods have failed.
A small transmitter affixed to the arrow syncs with a small handheld receiver allowing the hunter to track the animal regardless of where it goes.
Batteries are rechargeable and the transmitter is light enough that it doesn't interfere with accuracy.
Watch the above to see how it handles in the field.
Read more about Pro Tracker here.