This is J&M®'s heavy-duty P-Series 8-pin lower-section hook-up cord with in-line volume control, can be used with all J&M® headset #'s HS-ICD284, HS-BCD279, HS-ICD279, HS-CD9279, HS-BCD277, HS-ICD277, HS-BCD257, HS-BCD174, HS-ICD174 and HS-CD9174 series, for connection to 1999-2014 J&M® & BMW® 6-pin audio systems. Single.