Unlike their performance tracking devices, which provides valuable insights to teams through precise location and movement tracking, SafeZone is only measuring the proximity between people and the length of time interactions occur. As training is underway in the Orlando bubble, the NBA made these devices available to players, however it is only mandatory for league officials and members of the media. In its safety and protocols document obtained by CNBC, the NBA assures players the devices will not be used to access GPS location.