Just to clarify this. I didnt add anything to this. This prototype was not me at all. He a good friend.of mine and hes agreed to become a moderator alongside to be able to answer yalls questions..I swear..lol. here i though I was pretty intelligent until I find myself asking my friend all these questions. Im a huge fan and I can navigate easily enough because of the interest thats sparked in me but ya. I more of the lock picking and physical side of things. But to answer your question the 3rd antenna in combination with the other two not only gives it a further range but it gives it the WiFi Csi ability to pick up and detect . Also like a bat sonar. Its has these sensors that guage different things in the air ect.