Product Features This featherweight wearable device from Babolat and PIQ straps to your wrist to monitor your performance during practice or matches Every swing is tracked and analyzed to provide you with details about how well you are playing. The technology monitors your swing, spin, speed and stroke type to give you a complete overview of your game. Find out how fast you served the ball with a quick glance at the bright LCD display on your wrist The Babolat and PIQ app on your smartphone will download all of the information from the sensor and provide a graphical readout of your performance, highlighting the best parts of your game - these Winning Factors help you improve in the next round. Use the community features to track your performance against your friends Product Specifications