Uniden has licensing agreements with RR to make the RR database info available through Sentinel for the database type scanners. Through an automated process, Uniden servers pull the RR database data up to their servers sometime on Sunday evenings and format and modify it for use with the scanners that use Sentinel. Uniden then makes the updated database available for downloads from their server through Sentinel on Monday mornings (barring occasional glitches in the process).