The X4 Power Flash arrives Pre-Loaded with DYNO Proven tune files that increase horsepower and torque. Programming your vehicle with one of SCT's pre-loaded performance or fuel economy tune files is as easy as 1-2-3. Simply plug the OBDII connector into your vehicle's OBDII port, select the pre-loaded tune file using the simple to navigate menu and within minutes the X4 programs your vehicle. With a large backlit display, the SCT X4 Power Flash makes it EASY to read the Built-In Data Logging or Real Time Monitored Vehicle Data, view popular sensor data such as EGT, Air / Fuel Ratio or any other 0-5 Volt source. The X4 Power Flash device backs up your factory PCM program during installation should you ever need to return your vehicle to the stock PCM program. Restoring your vehicle to the stock PCM program is as easy as selecting Return to Stock from the device menu.