FHS Behind-The-Head Fire Safety Industrial Headset by Rugged Radios is a universally designed, comfortable behind-the-head fire headset compatible with almost any fire intercom. This headset features a dual 5-pin quick-disconnect for right or left dress and a DNC microphone for clear transmissions. Additionally, it includes clear hear speakers for unsurpassed audio performance and a noise cancelling hybrid EM56 microphone. The headset is available in three configurations: no buttons, PTT (Push To Talk) button on ear dome, Mic On/Off button on ear dome. It comes with a rugged full flex mic boom, large detent volume control, and a stainless steel behind-the-head band. The cable compatibility extends to David Clark, Avcomm, Sigtronics, Rugged and Firecom headsets.