VEXnet-Field-Controller-Kit-VEX-275-1401-p-These-Field-Controllers-are-identical-to-the-ones-used-at-official-VEX-Robotics-Competitions-They-allow-you-to-switch-up-to-4-robots-between-Autonomous-&-Driver-Control-modes-as-well-as-enabling-&-disabling-them-The-Field-Controllers-connect-to-the-USB (Universal Serial Bus)-port-of-a-PC-or-laptop-&-work-in-conjunction-with-the-free-Tournament-Manager-software-for-reliable-&-accurate-starting-&-timing-of-matches-Download-the-latest-version-of-Tournament-Manag