Series 6700 Radio Direct headsets provide clear communications and hearing protection for high-noise environments. Headsets connect directly to portable radios with no adapter required. H6700 Series headsets are also Intrinsically Safe (IS) and carry FM Approval for those areas that require Intrinsic Safety ratings. Ideal for oil rigs, gas refineries, chemical and paper plants, blasting sites - virtually any potentially explosive industrial or manufacturing environment. Modular Headsets provide even greater flexibility utilizing interchangeable communication cords for connection to a wide variety of radios using the same headset. David Clark Company Series 6700 Radio-Direct Headsets afford clear communications and effective hearing protection for high-noise environments. H6700 Series Headsets carry worldwide FM Approval for those areas that require Intrinsic Safety ratings, while providing the same rugged durability you've come to rely on from David Clark Company.