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The Rugged Radios FHS OTH FSI over-the-head headset is offered without buttons and is described as compatible with David Clark, Sigtronics, and Avcomm systems. Intended for fire safety or industrial over-the-head use, the headset’s source-supported compatibility list notes those vendor systems, making it a selectable headset option where those intercom standards are required.
Rugged Radios FHS OTH FSI Headset No Buttons / For David Clark / Sigtronics / Avcomm
