DB21 Packing List: 1 x Stereo wire harness; 1 x Car antenna adapter; 16 x Butt Connectors. Compatible with select Acura TSX 2009-2014 / Honda Accord 2008-2012 / Honda Civic 2009-2011 / Honda Insight 2010-2014 / Honda Odyssey 2008-2010 / Honda Pilot 2009-2011 / Honda Ridgeline 2009-2014 vehicles. Standard EIA color codes: The harness meets EIA color codes, easy to install it by matching up the colors, provide a consistent and simplified installation. No Cutting Wires Required:Just plug the adapter directly into factory-installed wiring harness. [Compatible with non-amplified factory systems]. Factory Antenna Adapter: Used to connect vehicle factory antenna to an aftermarket radio, the blue wire of antenna adapter is connected to antenna turn on lead of an aftermarket radio. Aftermarket 24pin Wire Harness Adapter: Used to replace the factory oem radio with your aftermaket new radio and let you add aftermarket radio with up to 4 speakers to your car.