Superchips FlashCal F5
I bought it to calibrate the speedometer after getting bigger tires and changing gear sets in my jeep. It worked flawlessly and it took only a few minutes to use. The screen is very useful and the tool is straight forward and easy to use. It can reset and check engine light codes and many other things. I would definitely recommend this product to others.
Bigger tires, changes gears? You need this!
This tool worked well for my 2015 Jeep Rubicon Unlimited. I recently upgraded the tires to 35" and the tool worked flawlessly to set the speedometer to reflect the new tire size. This is vehicle VIN specific; once it reads your Jeep's VIN its locked to it.