When replacing the OEM radio with an aftermarket radio some feature can be lost. Using our interface you can retain those features. This interface will also provide you navigation signal outputs ( parking brake, Reverse, and Speed sense), retain chimes through a onboard speaker, retain steering wheel audio controls, and work in non amplified models.Specifications: WARNING CA Proposition 65 Yes WARNING CA Proposition 65 Message WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov Description_DES Radio Data Interface Description_EXT Radio Data Interface; With Steering Wheel Controls; Includes Antenna Adapter; Description_FAB Radio Data Interface Description_MKT When replacing the OEM radio with an aftermarket radio some feature can be lost. Using our interface you can retain those features. This interface will also provide you navigation signal outputs ( parking brake, Reverse, and Speed sense), retain chimes through a onboard speaker, retain steering wheel audio controls, and work in non amplified models. Description_SHO RadioModInt