FHS Over-The-Head Fire Safety Industrial Headset is a universal design by Rugged Radios, compatible with almost any brand or type of fire intercom using optional coil-cords. This headset offers a reversible design for right or left-dress cord connection, with a serviceable construction for active usage. It is available in three configurations: No buttons, PTT (Push To Talk) button on ear dome, and Mic On/Off button. This fire safety headset features a DNC microphone for clear transmissions, Clear Hear speakers for unsurpassed audio performance, a comfortable over-the-head design, noise-cancelling hybrid EM56 microphone, a rugged full flex mic boom with a large detent volume control, and a carbon fiber style finish. Compatible cables include David Clark, Avcomm, Sigtronics coil cord CC-1/4, Rugged, and Firecom headsets.