Got a question. I notice NBA officials wear something on their belts that is some sort of wireless piece of equipment. Are they being recorded? Also, they seem to switch something after an inbound play. Some of you must know what that's all about. Just wondering.
Rookie ref, Jay R.

That's part of the Precision Timing system. The refs wear a special microphone that stops the clock when the whistle blows. When the clock is to start, they press a button on the box on their belt, and another radio signal is sent.