PhatNoise Car Audio System - Manual (Page 44)

8. Press the Check for Updates from PhatNoise Website button
to load the latest set of head unit firmware available for
download.
NOTE: if the Version number of the firmware package is higher
than the version number in your “Current Setup,” it is newer
firmware. Left click on the firmware package you want to
download (there may be only one).
Page 44
PhatNoise Car Audio System User Manual
1302-MAN Copyright 2003 PhatNoise Inc.