Activity trackers like FuelBand are great if you just want to exercise, but Zepp Labs’ new 3D motion sensor might be more useful if you’re seriously training in a sport — especially if it’s tennis, baseball or golf. A 1-inch square of negligible weight, the sensor captures data from each swing you make — so long as you attach it to a glove, racket or bat — then transmits info to its accompanying iOS or Android app via Bluetooth. The kind of data saved depends on the sport, such as bat speed and angle at impact for baseball, or shot type, power and spin for tennis, which you can then examine in 3D with a 360-degree view within the app. According to the company, the sensor lasts up to eight hours per use. So, if you’re into real sports instead of their virtual counterparts, you can snag Zepp Tennis, Baseball or Golf in November for $150 per set, which includes the sensor, mount and app.