RFID refers to radio frequency identification technology. It helps to track the objects or individual easily. Multiple transponders are used in the RFID tags to create links with the reader or scanner. RFID tags do not need to be placed with the direct contact of the scanner or reader.
It can be kept within a certain distance with the scanner or reader to track the data which are stored within the tags. You may search for the RFID chip timing Alexandria Virginia on the Internet for obtaining more information on this regard.