Not me. Besides it costs as much as a whistle. I can spend that money on something other than a devise that makes me do the scorer's job.
Next they will try to sell us a devise we can put on one finger of each hand so we can keep track of points. Maybe a white one for the home team to be placed on right hand and a black one on left hand for the visitors.
Something similar to the devises that track the number of people entering a
game.
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