ShotTracker—a new invention from two serial entrepreneurs from Kansas City—is now available for sale through the company’s website.

It’s a wearable technology that lets basketball players automatically track their shot attempts. Users wear a lightweight wrist sensor that interacts with a weatherproof sensor attached to a basketball hoop. Those two pieces feed data to an app that lets players see how many shots they took and how many they made.

The app also offers shooting challenges and long-term tracking of a player’s progress.

ShotTracker is the brainchild of Davyeon Ross, the founder of Digital Sports Ventures, and Bruce Ianni, who started Innovadex. Ross played basketball for Benedictine College, and Ianni, a college football player, was on his high school’s basketball team.

They’ve designed ShotTracker with performance in mind, so that players and their coaches can get the best possible data from the system. The wrist sensor, for example, is built so that it only counts shot attempts, but not dribbles, shot blocks, pump fakes and other movements.

“ShotTracker is a solution that we’ve worked very hard to make a useful device for coaches and individual athletes to use,” Ross said. “From my experience in basketball, you can’t improve what you don’t measure, and that’s really the purpose of ShotTracker. This device is going to change the way athletes train by letting them see what they need to work on in real time.”

The ShotTracker set sells for $149, and it works with both Apple and Android systems.