Our T-harnesses let you integrate an additional device such as an aftermarket bluetooth kit into your car's factory radio and it's wiring. This allows your aftermarket Blue tooth kit to work with your car's speakers directly when on a phone call and revert back to the stereo when the phone is not in use. CT10TY01 Avensis ACM20R/ACM21R 2000-2009 Camry ACV36R/MCV36R 2002-08/2006 Celica ZZT231R 1999-2005 Corolla ZZE122R 2002-2007 Corolla ZRE152R 2007-2011 Echo NCP10R 1999-2002 Hilux 7th Generation 2005-2011 Kluger KX-R, KX-S, Altitude, Grande 2007-2011 MR2 Spyder 2000-2002 Prado 120 Series 2003-2009 Prius 2001-2003 Rav-4 2001-2002 Rav-4 2006-2011 Yaris 2005-2011