No huddle, plays or assignments on bands?

I know coaches that have done that (using "codes" that are a bit more disguised) but we use our wrist coaches for the plays. We will call in the formation from the sideline and the players will echo it across the field. We'll then call our coded play - we use a 3 window wrist coach - that states the play and snap count. We can call about 75% of our plays 6 different ways.