I’ll admit at first I was a little confused to how this thing works. But I read the directions for a second and it made it very easy to understand. The thing is no longer then my index finger I was expecting it to be much bigger which is actually a very good thing, it also comes with a piece of 3Mtape that is fit perfectly for you to mount the device with. I traded in my car and with no problem at all but is able to get it to work in both directions a.k.a. transmitting and receiving. I am easily giving this five stars because of how easy it was to set up and how versatile it is.
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