FHS Behind-The-Head Fire Safety Industrial Headset by Rugged Radios is a universal design compatible with nearly any fire intercom brand. Featuring quick-disconnect for preferred right or left dress, the coil cord is serviceable for active job use. Comes in three configurations: no buttons, PTT (Push To Talk) button on ear dome, Mic On/Off button on ear dome. Included DNC microphone and Clear Hear speakers ensure clear transmissions and superior audio performance. Comfort elements include Behind-The-Head design and Stainless Steel band. A noise-cancelling hybrid EM56 microphone, rugged full flex mic boom, large detent volume control, and carbon fiber style finish add to usability. Compatible with David Clark, Avcomm, Sigtronics, Rugged and Firecom headsets.