The EvoHT is a premium hand-held performance tuner from Edge Products. The EvoHT was developed specifically to give you the most power at the best price, with industry leading service and quality that comes standard with every Edge product. With the Edge EvoHT, you literally hold the power to unlock the hidden potential of your truck or SUV power and fuel economy in the palm of your hand! Improves fuel economy and towing capabilities Installs in minutes with no tools required Speedometer calibration for axle gear and tire size changes* Advanced tuning selections from rev limits to shift points* Monitor engine and transmission parameters