The ProCal is simple to use. Once the module's dipswitches are set at the desired parameters, the unit plugs into the Jeep's OBD port with the engine off and the ignition on. Recalibration is almost instant. The module can reprogram a number of important factory parameters such as tire size, axle gear ratio, low tire pressure indicator, and one-touch lane change. It can set temporary extended idle, can clear diagnostic trouble codes, and can reprogram smart bar indicator disable. It provides dead-center steering wheel indication, daytime running lamps, and pedal calibration and tolerance, and the module will program a vehicle's VIN into a new PCM controller.