about 2 hours ago

What’s Inside an NFL Helmet? MKBHD Dissects One To Find Out

YouTube tech reviewer Marques Brownlee (MKBHD) unpacked how NFL helmets enable coach-to-player communication. Each helmet has two speakers, an encrypted receiver, and a six-hour battery, marked with a green NFL sticker. Coaches press a belt-pack button to transmit calls, but only until 15 seconds remain on the play clock. Players can’t talk back, ensuring one-way secure communication.