Use this adapter to make your installation of a 4 channel amplifier to the factory system faster with a cleaner install. Use this plug and play adapter so you don't have to cut or splice into the factory wiring. Provides 2 pair stereo RCA output and a power wire for the remote amplifier turn on connection. Adjustable 4 channel gain output. Retains fader and balance. Connection is done at back of radio. Bare speaker wires on this adapter to connect factory speakers to the new amp. VERY IMPORTANT----PLEASE READ BEFORE PURCHASE---- Not compatible with factory amplified stereo systems. Only works with factory non-amplified systems (no JBL/Synthesis, etc.) Connecting this adapter to the factory wiring will disconnect the vehicle speakers from the radio- required adding amp for speakers to work. Compatible vehicles: No external factory amp: Made for Scion: 2013-2016 Frs ,2012-2015 iQ, 2005-2016 Tc, 2004-2006 Xa , 2004-2015 Xb, 2008-2014 Xd Made for Toyota: 1987-2019 4Runner, 2017-2020 86, 1995-2018 Avalon, 2018 C-HR, 1987-2017 Camry, 1987-2005 Celica, 1987-2019 Corolla (no 2019 hatchback), 2000-2006 Echo, 2007-2014 FJ Cruiser, 2001-2019 Highlander, 1988-1994 Land Cruiser, 2005-2014 Matrix, 1987-2003 MR2, 1992-1997 Paseo, 1987-1995 Pickup, 1991-1997 Previa, 2001-2019 Prius (no Prime), 1996-2018 RAV4, 2001-2019 Sequoia, 1996-2017 Sienna, 1999-2008 Solara, 1987-1992 Supra, 1993-1998 T-100, 1995-2019 Tacoma, 1987-1998 Tercel, 2000-2019 Tundra, 2009-2015 Venza, 2007-2016 Yaris Use this adapter to make your installation of a 4 channel amplifier to the factory system faster with a cleaner install. Use this plug and play adapter so you don't have to cut or splice into the factory wiring. Provides 2 pair stereo RCA output and a power wire for the remote amplifier turn on connection. Adjustable 4 channel gain output. Retains fader and balance. Connection is done at back of radio. Bare speaker wires on this adapter to connect factory speakers to the new amp. VERY IMPORTANT----PLEASE READ BEFORE PURCHASE---- Not compatible with factory amplified stereo systems. Only works with factory non-amplified systems (no JBL/Synthesis, etc.) Connecting this adapter to the factory wiring will disconnect the vehicle speakers from the radio- required adding amp for speakers to work. Compatible vehicles: No external factory amp: Made for Scion: 2013-2016 Frs ,2012-2015 iQ, 2005-2016 Tc, 2004-2006 Xa , 2004-2015 Xb, 2008-2014 Xd;;; Made for Toyota: 1987-2019 4Runner, 2017-2020 86, 1995-2018 Avalon, 2018 C-HR, 1987-2017 Camry, 1987-2005 Celica, 1987-2019 Corolla (no 2019 hatchback), 2000-2006 Echo, 2007-2014 FJ Cruiser, 2001-2019 Highlander, 1988-1994 Land Cruiser, 2005-2014 Matrix, 1987-2003 MR2, 1992-1997 Paseo, 1987-1995 Pickup, 1991-1997 Previa, 2001-2019 Prius (no Prime), 1996-2018 RAV4, 2001-2019 Sequoia, 1996-2017 Sienna, 1999-2008 Solara, 1987-1992 Supra, 1993-1998 T-100, 1995-2019 Tacoma, 1987-1998 Tercel, 2000-2019 Tundra, 2009-2015 Venza, 2007-2016 Yaris