This P-Series 8-pin lower-section hook-up cord is to be used with All j&m headset series 'S hs-icd291, hs-bcd291, hs-icd284, hs-bcd279, hs-icd279, hs-cd9279, hs-bcd277, hs-icd277, hs-bcd257, hs-bcd174, hs-icd174 and hs-cd9174 series helmet headsets, for connection to 1999-2018 j&m Corp 6-Pin audio systems.