Precision Timer Referee Zipper Lanyard
Precision Time Systems zipper lanyard that attaches to your shirt. The computer chip of a PTS is tuned to the frequency of the FOX40, so when it is blown, a microphone and transmitter instantly send the whistle signal to the clock, thereby shutting it off
Note: Computer chip, belt pack and mini-microphone supplied direct to participating schools by PTS.
FOX 40 not included