The Rostra Cruise Control kit is designed to add a cruise control system to those vehicles which did not come with one from the factory. You can set your desired speed by using the Rostra cruise control switch that is steering column mounted. Once you set your speed, the Rostra cruise control measures engine load and vehicle speed to ensure your car stays cruising at the desired speed. You can slow down or accelerate from your cruise by using this switch for ease of use. The cruise controls feature set speed, tap up/tap down (1 mph per tap), coast/reduce speed, resume/accelerate, and controlled resume rate. While most customers install these aftermarket kits themselves, we recommend professional install of this cruise control system.