Rugged Radios H15 Black Single Side Over The Head Headset Military Grade M101 Microphone 50mm clear hear audio speaker Universal 5 pin radio port Fully adjustable side pad Thumb nut headband adjuster Fully Adjustable Side Pad 5-Pin Universal Radio Port Military Grade M101 Microphone 50MM Clear Hear Audio Speaker Great for Crew Chiefs, Spotters, Safety Officials and Mechanics