The Edge Insight CTS3 is the key to being able to monitor your vehicle's performance with its on screen digital gauges. Whether you have a stock truck, or one with a ton of upgrades, you will appreciate this product! It is compatible with most domestic gas and diesel vehicles 1996 and newer. All you have to do is plug it into the OBDII port, and mount the monitor and you are ready to use it! 
The CTS3 can monitor many different things for your vehicle, such as your speed, boost, RPMs, coolant temperature, fuel level and so much more. It is extremely customizable, with its different color options and gauge display styles. You can also customize it to alert you when a gauge reaches a certain level.
Your Insight CTS3 can also read and clear your vehicle DTC codes, so no more having to go to a shop or part store to figure out what code just came up on your vehicle.
The CTS3 monitor is a great product at a great price. Totally worth the investment.