Mine is as high as I can get it right behind the mirror. No issues at all.

 

So no issues, right?

 

No issues with mine, have it in a holder with a suction cup on it. Put it behind rear view mirror when I'm traveling on a toll road.

 

I'm going to go out on a limb here and conclude that it works fine.

Thanks to everyone who replied. It was like a little tour of America!

 

Have a tint strip on my windshield and have the ezpass behind the tint strip and still works fine

 

Just a side note... I added a dash cam to my Dodge Charger and routed the power & gps antennae wires up toward the headliner... the path of the wiring was close to the Ez pass... and the next toll plaza indicated "toll not paid". Thought it was an anomaly.. but it happened a few more times.. I moved the EZ Pass away from the dash cam.. no more issues..