This heavy-duty Z-Series 6-pin lower-section hook-up cord is to be used with all J&M® Elite Series headsets HS-ECD629, HS-ICD629, HS-ECD584, HS-ICD584, HS-ECD477, HS-ICD477, HS-ECD374, HS-ECD271 and HS-ECD269 headsets for connection to 1999-2012 J&M Corp® & BMW® 6-pin audio systems.