ummm in college basketball the officials start the clock the last 2 minutes with that little box on their belt
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Ummmm...no.
Section 9. Start Game Clock
Art. 1. After time has been out, the game clock shall be started when the official signals time in. When the official neglects to signal, the official timer shall be authorized to start the game clock unless an official specifically signals that time shall continue to be out.
What you are likely referring to is Precision Timing Technology which is not a "box on their belt" but a microphone that senses the frequency content and level of an official's whistle and starts/stops the game clock using a microprocessor operating on a wireless spectrum. The NCAA is still evaluating this technology and it is not widely used and NOT in the tournament.