RFID reader

This is an RFID reader that can automatically read several different kind of official identity documents, including U.S. Passport cards (but not Passport books); Border-crossing cards that allow non-citizens to travel up to 25 miles into the U.S. for up to 30 days; and SENTRI cards, which expedite passage for regular border crossers who have voluntarily gone through a background check and interview.

This helps speed up passage for everyone because the card reader gives the primary inspection officer information on the person using the card before they get to the booth.