The NP-PA521U-13ZL supports a maximum resolution of 1920 x 1200 (WUXGA). That's over seven times the resolution of a 640 x 480 (VGA) data projector, which is the most common resolution supported by data projectors of this age and spec. 640 x 480 (VGA) is also supported by this 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 projectors of this type and age.
Amongst similar types of projector the worst supported resolution is 640 x 480 (VGA).