Improve your tennis game with the new Shot Stats Challenger that attaches to your racket and will analyze your swing. It fits any tennis racket and will reveal key stats about your swing so that you can get better and win more matches. It fits on rackets like a normal dampener and won’t interrupt your play, providing standard vibration dampening while weighing less than three dampeners. And as your racket takes a beating, the Challenger won’t get damaged thanks to its high-strength aircraft aluminum body. It also looks good thanks to its angular design and matte black finish that even looks stealthy. click here for complete story