Using flip boards to call no huddle-Legal?

[RMR]

Originally Posted by umpirebob71

To tell them what...the score? As usual, you bring a knife to a gunfight.

It doesn't take too much imagination to see how one could use such a thing to signal in plays using numbers to send in plays using that "scoreboard" and QB wristbands (each player gets their own).

I've seen at least a couple teams use this exact method - a couple of managers flip the numbers to the play the coach wants called - the players look for the corresponding play on their wristband and off they go.