Listing my Diablosport Predator Handheld tuner. It is the U7146, with the original software revision that still allows you to delete rear o2 sensors for your off-road X pipe so it won't trip the check engine light. It was locked when I bought it; you will need to pay $120 to Diablosport and they will give you the unlock code. I talked to Mike Litsch at Diablosport and they do this unlock process. Selling for $50; pretty cheap for this tuner, as list price is over $300 and this model still turns your check engine light off.