Throughout an NFL game two players in the team have a speaker in their helmets in which coaches call in the plays to relay to their teammates, with two positions regularly being allocated the role ...

NFL players are able to communicate with their coaches on the sidelines thanks to microphones and speakers in their helmets, with two players on each team able to do so ...

The green dot on NFL helmets signifies a ... with their coaches (via Pro Football Network). Quarterback helmets are equipped only with a speaker in their helmet. Ideally, the NFL allows one ...