The highest resolution supported by the NP-PA621X is 1920 x 1200 (WUXGA). That's over seven times the resolution of the most common graphics resolution of 640 x 480 (VGA) (which is also supported by this NEC projector). In addition, this data projector support graphics resolutions of 1024 x 768 (XGA), 1280 x 1024 (SXGA), 1400 x 1050 (SXGA+) and 1600 x 1200 (UXGA) and 800 x 600 (SVGA).
A 1920 x 1200 (WUXGA) graphics resolution is actually the best supported resolution amongst all similar spec multimedia projectors that have been available for around the same time as the NP-PA621X.
Amongst similar types of data projector the worst supported resolution is 640 x 480 (VGA).