ivotuk
Well-known member
"he system involves equipping the football with a battery, magnetic transmitter, and loop antenna. Even with that extra gear on board, the ball still falls within the accepted weight range for use in National Football League games in the US."
http://www.gizmag.com/football-tracking ... lds/32542/
http://www.gizmag.com/football-tracking ... lds/32542/