By Jeff Griffin, Contributing Editor | September 28, 2010

The Earmark product line consists primarily of radio headsets, belt-worn radios, voice amplifiers and microphones, and repeating base stations. For the construction industry, Earmark radio headsets mount with brackets on Bullard-style slotted hard hats. Used in conjunction with base stations, the headsets can put up to nine people into continuous duplex communications or half-duplex or simplex communications for unlimited team sizes. Products can be tailored into a system that meets a wide range of hands-free communication and hearing protection requirements.

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