It's my Ez-pass,if you call up and ask them for the license plate one instead of the boxed type one you stick to your windshield they will send it. Found out about it yeeeeaars ago from my mother who "refused to put a normal ez pass in her Lexus now Mercedes"(lol). Had one on every car ive had since,some people get anal that don't know about them and ask "don't you gets afraid it'll get stolen?" In 8years,it's never happen to me,and mostly everyone around me has one now. Plus I'm pretty sure each ez pass it assigned to their car,so if someone steals it and uses it,it should pickup that it's being used on a different car. I probably would notice it by days end anyway bc I commute 5 days a week and have to use it a lot.
-ry