PAC RP4-MZ11 All-in-One Radio Replacement and Steering Wheel Control Interface (for select Mazda vehicles): * Pre-loaded with amp retention and navigation based output signals * Retains all important OEM safety and convenience features * Data-controlled rap accessory output * Data-controlled outputs for connection to navigation radio and speed, reverse and E-brake status output wires * Keeps vehicle data-bus intact for service and emissions testing * Retains factory installed amplified audio system * Interface can be quickly updated if needed from the PAC website using a PAC-up USB adapter