US President Barack Obama was spotted using Game Golf, a digital shot tracking system, during a recent round of golf.
Photos have appeared of him using clubs with the system's proprietary red tags in the butt of the club and wearing the tracking device on his belt to tag the clubs before each shot.
Game Golf users tag their position and club before each shot. They can then review details of their round afterwards, including their distances, accuracy and short game stats.
The system has recieved backing from high-profile Tour players, including Graeme McDowell, Lee Westwood and Jim Furyk, who have all invested in the product.
For more information, visit www.gamegolf.com