What ever you do, don't get the Innovate LM-2. It is a huge POS. I just sunk $700+ dollars into one with the all of the adapters I need - two O2 sensors, tailpipe clamps so it can be transfered from vehicle to vehicle, harness extensions, inductive clamp, and the module. It is my understanding that the other Innovate products are ok, but this one isn't and there are known problems with this model. I sure wish I had searched reviews on the web before I bought this. It gives very erratic O2 readings at idle, the inductive clamp doesn't work to read RPM's, datalogging locks up, and reading/clearing vehicle codes works sometimes. After trying this out on my car this past weekend (and just outside of the 30 day return policy), the problems I read about on the web with this is the same problems everyone else experiences. O2 readings are so inconsistent, I would not trust the readings at all.