Sent me a used, broken item!
The tach didn't work, lots of problems. Been with jet performance on the line for hours. They requested me to return the unit. It appears to have been a used unit, as the plastic for the pins was pierced multiple fold, but it wasn't by my socket (all my pins are still ok).
Well when I first received it.It DID NOT WORK.I called Scan Guage and explained my problem.They send me another unit.I installed the new unit and I really did not have a chance to really try all the modes as of yet.This unit did connect,so I hope it will be alright.Other than the additional wait,to get new unit.I hope I have no further problems.