The Pulsar is an in-line computer that connects directly to the vehicle PCM, with no additional wiring harness. By connecting directly to the truck’s PCM, Edge has the ability to control the vehicle to optimize performance gains, throttle response, Multi-Displacement System (MDS) controls, mileage, and more. To make things even better, the Pulsar offers 8 performance levels that can be switched on the fly by using the vehicle cruise control “+” and “–” buttons on the steering wheel. The active power level (1-8) is displayed where the gear indicator shows on the dash. Pulsar installs in minutes and is the most exciting and innovative product on the market for 2015-2018 Ram 1500 Hemi trucks!