Flashpaq units are handheld tuners designed to enhance today's computer-controlled engines. By reading and re-tuning the power curves and timing tables in the engine control unit, Superchips releases the horsepower left in the motor by the manufacturer. Since the Superchips Flashpaq reprograms the engine to operate more efficiently, users report both increased fuel mileage as well as added power. Flashpaqs also read the diagnostic trouble codes so the user can troubleshoot the vehicle.