FITLIGHT is revolutionizing athletic training. It's a series of small black disks, each capable of lighting up in six different colors. Along with the interconnected tablet, these simple lights are changing the way elite athletes train. Known as The FITLIGHT Trainer system, the technology is already being used by teams like the Cleveland Cavaliers, Toronto Raptors, Nashville Predators and Vancouver Canucks. Individual athletes like J.J. Watt, Antonio Brown and Steph Curry include the tech in their training.

How did a set of flashing lights become the hottest thing in athletic performance training? Here's how this technology is helping elite athletes take their game to a whole new level.

FITLIGHT Trainers are available in three different bundles—a 4-light system, an 8-light system and a 24-light system. Each system is fully expandable up to 32 lights.

The heart of the system is the tablet controller. Included with each purchased system, the Tablet Controller is where "all light operating functions and protocols are programmed and run." it's also where the data an athlete creates is displayed and stored. 

The lights themselves are LED powered, water resistant and have a battery life of four hours. They can transmit data back to the controller from a range of at least 50 meters—outdoors, the range can extend up to 75 meters.

The basic idea behind the FITLIGHT Trainer's applications is pretty simple. "The lights are used as targets for the user to deactivate as per the reaction training routine. Various measurements can be captured for immediate feedback in relation to the user's performance," reads an explanation on the company's website. "During any type of training, specifically speed and agility training, the lights can be deactivated by use of the user's hands, feet, head, or sport/fitness related equipment, either through full contact or proximity with this revolutionary reaction training system."