PAC RP4-MZ11 All-in-One Radio Replacement & Steering Wheel Control Interface (for Select Mazda Vehicles) All-in-one radio replacement & steering wheel control interface Preloaded with amp-retention & navigation-based output signals Retains all important OEM safety & convenience features, Data-controlled RAP accessory output,Data-controlled outputs for connection to navigation radio & speed, reverse & e-brake status output wires Keeps vehicle database intact for service & emissions testing, Retains factory-installed amplified audio system Interface can be quickly updated if needed from the PAC website using PAC-UP USB adapter(For select Mazda vehicles)