A quick update ... I now have a better quality triple window velcro youth and adult wristbands at the same price that I was selling the single window ones ... $3.50 each if you get a customized sign system (usually just $45 for 3 sets of signs). So for anyone wanting to combine both hitting and baserunning with pitch-calling or defense, you won't need to flip them over between 1/2 innings anymore. Plus, if you get more than one system, I am willing to do the second system at half-price ($22.50). Email me at email@example.com for more info.