The EVOHT from Edge Products is a premium handheld performance tuner for your Ford diesel powered truck. The EVOHT was developed specifically to give you the most power at the best price, with industry leading service and quality. In addition to the multiple performance tunes available for your Ford diesel, the EVOHT is a full functioning scan tool that reads and clears trouble codes. Adjustments to the shift firmness and shift points combined with additional horsepower and torque does help with fuel economy as well as improved towing capabilities. This handheld tuner is internet updateable via the built-in USB port. Simply plug in and update your EVOHT for the latest updates, software, and calibration files.