Derringer features 6 power levels adjustable on-the-fly. Interfaces with OBD-II (On-Board Diagnostics) to communicate with the vehicle's ECM. AutoRate uses vehicle data to adjust tune in real-time. ActiveSafety protects engine/powertrain. TransCommand protects transmission. Control Derringer, monitor key engine and transmission functions, record up to 100 parameters for hundreds of hours, read and clear codes with iDash DataMonster or SuperGauge.