Shure BRH440M Dual-Sided Broadcast Headset Closed-back, circumaural design that provides superior isolation from background noise Natural, clear vocal reproduction with frequency response optimized for communication in loud environments Ergonomic, adjustable headband with premium padding and optimal coupling force for comfortable extended wear Flexible boom microphone that pivots 270 degrees for left or right side wear and precise positioning Flip-up mute function that deactivates the boom microphone when raised vertically away from the mouth