from the Financial Review,

It’s small, it measures more than 100 fields of data and it’s discretely worn under the jerseys of AFL footballers, the shoulder pads of NHL ice-hockey players and even the waistcoats of Spanish bullfighters.

GPS tracking devices for professional sportsmen and women are becoming increasingly important to sports scientists and coaches to measure player movement and fatigue during matches and training – everything from how quickly an athlete accelerates to how their heart changes – to improve game strategy and training programs.

And the world’s biggest provider, Catapult Sports, is operating out of small factory in South Melbourne.

“We’re on the way to being a billion-dollar company one day,” says Catapult chairman Adir Shiffman. From modest beginnings, with a few AFL players as clients, the company has sold its devices to the Dallas Cowboys in the US’s National Football League, Italian soccer giant AC Milan and recently picked up its first ice-hockey team, the Philadelphia Flyers.

continue for more on the product the here is the company's website...