cheap wireless parking sensor for front (license plate)??
 

Just wondering if there is something cheap wireless that is possibly just built into the license plate just something basic for when i pull into a parking spot in my building.

just searched ebay, there are tons out there. all seem to come with 4 sensors, need to be wired to the mainbox, but the box wirelessly communicates with the display.

http://www.ebay.com/sch/i.html?_nkw=...parking+sensor