The highest resolution supported by the CVHD-31B is 1920 x 1200 (WUXGA). That's over seven times the resolution of a 640 x 480 (VGA) data projector, which is the most frequently found resolution supported by data projectors that are a comparable age to the CVHD-31B. 640 x 480 (VGA) is also supported by this multimedia projector.
A 1920 x 1200 (WUXGA) supported graphics resolutions is in fact the best supported resolution amongst all comparable spec projectors that have been around for a similar time to the CVHD-31B.
A 640 x 480 (VGA) supported graphics resolutions is the worst supported resolution across comparable types of projector.