This is a NEW Peripheral PPH1720 Bluetooth Handsfree Harness for integrating a handsfree phone system or carkit in select Honda / Acura vehicles. This is used along with an MSS speaker switch (also available in my booth) and a handsfree bluetooth carkit or other phone system. Some of the compatible vehicles include (for 16pin radio connectors): Acura CL 1996-1999 Acura Integra 1986-1998 Acura Legend 1986-1996 Acura NSX 1991-2004 Acura RL 1996-1998 Acura TL 1996-1998 Acura Vigor 1992-1994 Honda Accord 1986-1997 Honda Civic 1986-1995 Honda Civic 1999-2000 Honda Civic EX 1996-1998 Honda CRV 1997-1998 Honda CRX 1986-1991 Honda Del Sol 1993-1997 Honda Odyssey 1995-1998 Honda Prelude 1986-1998 Isuzu Oasis 1996-1999 This is not compatible with factory amplified sound systems, however (ex: BOSE, Infinity). I have a mobile electronics installation business, and am selling off some excess inventory. Please feel free to send a message if you have further questions about any of my items. Thanks for looking!