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The Rugged Radios FHS OTH FSI headset includes a mic on/off button and is described as compatible with David Clark, Sigtronics, and Avcomm systems. Built for over-the-head use in safety and aviation-style intercom environments, the headset pairs a simple mic control with explicit vendor compatibility to support integration with those specific comm systems as stated in the source.
Rugged Radios FHS OTH FSI Headset w/ Mic On/Off Button / For David Clark / Sigtronics / Avcomm
