All the stereo harnesses are included. The interface includes the full harness for the radio, along with the needed harness (adapter) for the antenna. It works the purpose to Retain CAN BUS, Auxiliary Audio Input, accessory power(RAP), RSE activation and update USB and stock backup camera function. Also, using this interface is essential if you would like to maintain steering wheel controls for vehicle.Makes connecting the radio a great deal easier. Essentially most of harness were plug and play. The module is designed for Sony Pioneer Alpine JVC Kenwood and more major aftermarket car radio stereo NAV. All-in-One Radio Stereo Harness Replacement & Steering Wheel Control Interface. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Interior Parts & Accessories\Other Interior Parts & Accessories". The seller is "rw_autoparts" and is located in this country: US. This item can be shipped to United States.