Hold off on buying the OT-1. I am currently trying to get a few things sorted with it. It says its just plug and play, but its not. Some readings are way off on it. I'll be just idling and my rpms will be reading like 5000 or something crazy. Some of the readings seem right on, but some like rpms are way off. I'm trying to get in contact with Innovate to see what might be up, stay tuned.