The Benq MX711 supports a maximum resolution of 1600 x 1200 (UXGA). That's over six times the resolution of a 640 x 480 (VGA) projector, which is the most common resolution supported by data projectors that were released more than two years ago. 640 x 480 (VGA) is also supported by this Benq data projector.
This projector's resolution (1600 x 1200 (UXGA)) is in fact the best supported resolution amongst all multimedia projectors of this age and spec.
Amongst similar types of projector the worst supported resolution is 640 x 480 (VGA).