Coollang Tennis Racket Sensor Tracker Motion Detector Analyzer with Bluetooth 4.0 Compatible with Android and iOS Smart Phone(Black)

Real-time racking of your dynamic trajectory, hitting collect data. Comprehensive analysis of explosive power to help you better mastery of the skill of playing tennis. Analysis of the motion data index, restore the real movement to help you get a balanced development. Accurately track speed, strength, angle, and other data, intelligent identify types of action, through data analysis, quickly master operating essentials. Note: Item appearance is under upgrading, New and old appearance will be shipped randomly.