Focus on the Game - Scoring Right is a portable personal tennis racket score keeper that attaches to your racket, allowing you to keep mark of the points, sets and games in a tennis match. With a weight of less than 1.9g, it's legal to use in social and competitive tennis with virtually no effects on your racket handling. This is the only ITF approved racket-mounted scoreboard. It will make it a breeze to keep track of points, games, sets, and even where to serve from. Forget about courtside scoreboards, flip boards, or net scoreboards. Scoring Right's portable score keeper allows for faster gameplay that's free of distractions, allowing you to focus on the game. Whether you're a beginner or a professional, keeping score will never be a problem again! Disclaimer: Before purchasing, check dimensions and suitability to your racquet throat. On some racquets attachment is only suitable on the outside of the throat such as: Wilson clash, Wilson Ultra, Babolat pure strike. Contact the seller if not sure. Please carefully follow application instructions. Beads may be hard to move at first but will loosen with time. Visit our website for full instructions and video on how to attach units to your racquet. Most compatible with paddle or racquet throat with width of a minimum of 0.75” / 1.9 cm. The units will not fit on lower grade racquets with lengthwise grooves along the throat. It is not suitable for pickleball paddles.