Quantify your swing with communication functionality ■Grasp your swing with accurate numerical values Adopts a microwave sensor compatible with the Radio Law.The Doppler effect and a lot of measured data realize high accuracy, and [head speed], [ball speed], [estimated distance], and [meet rate] are measured and displayed at the same time.No troublesome settings are required, just separate one club from the other and place it on the table ■Bluetooth communication support ・YG-Bracelet BLE (sold separately) communication support, allowing you to check values and change club positions at your fingertips, making it even more convenientThe GST App (free, iOS10 or later, Android 5.0 or later *Download from App Store or Google Play) automatically receives and displays swing data each time you swing, saves the log, and allows you to check detailed data such as distance and variation in meet rate for each club on the spot, enabling more effective practice and correction by understanding your shortcomings.By changing the coefficient when using a range ball, the distance can be corrected to the distance when using a course ball.Body size: 124mm(D)×60mm(W)×18mm(H) Body weight: 110g Usable time: Approx. 10 hours when fully charged Charging time: Approx. 3 hours Head speed measurement range: 10.0~99.9m/s Ball speed measurement range: 15.0~99.9m/s (0.5~15.0m/s when using putter)Measuring range of putter:0.5~15.0m/s) Measuring range of putter:0.10~1.80