The RFID tags are the data points which the ProxiPen 2 senses and reads automatically whenever they come into its reading range. The RFID tags may be concealed behind wallpaper, sheetrock, plaster, paneling, mirrors or any other nonmetallic surface; this is a real plus in applications where aesthetics or vandalism are considerations. The tags can be read even if they are wet, frosty, dirty, greasy or painted over.
