The OBDeleven Pro seems to work fine, I brought it to do battery adaptation on an Audi. I installed the ODBeleven application on my Andriod phone and it found the ODBeleven bluetooth just fine and was able to perform a system scan just fine. I would give it a higher rating but I could not install the "PRO" activation code from label on side of box. From the instruction on the internet it says to ".. go to Profile > Get PRO > select I have activation code > enter your code". In my ODBeleven application when I go to Profile > Get PRO, it just wants to order a new PRO code and does not offer the "I have activation code" option. I looked all over for other people having this problem and for a solution, but no luck yet.