Programs after-market radio and speakers; can activate intercom, Bluetooth, navigation/compass, CB, rear speaker switch and more Read and clear DTC (Diagnostic Trouble Codes) for ECU, TSSM, BCM, radio, speedometer and ABS Also monitors engine parameters such as RPM, TPS, battery voltage, engine temperature Radio and speaker zoning and configuration system that doubles as a diagnostic tool. CENTURTION HD AUDIO DIAG