I bought the Valentine Research Savvy to discretely power my V1, but before I could use it, I got news that it won't work with the OBD-powered JB4. Since I'm not going to get rid of JB4, Savvy has to go. I paid $65+$9 shipping. It never even left the box. You can have it for $55 shipped firm. Otherwise, I'll just send it back to Valentine.