The highest resolution supported by the Acer P6200S is 1920 x 1200 (WUXGA). That's over two times the resolution of a 1024 x 768 (XGA) projector, which is the most frequently found resolution supported by comparable spec data projectors that are a similar age to the P6200S. 1024 x 768 (XGA) is also supported by this multimedia projector.
A 1920 x 1200 (WUXGA) graphics resolution is in fact the best supported resolution across all data projectors that came out around the same time as the P6200S.
Across comparable types of multimedia projector the worst supported resolution is 640 x 480 (VGA).