ASUS latest trendy PG191 LCD Monitor features Angle of visibility Horizontal 160° / Vertical 160°, Maximum luminance 320cd/m2, Contrast Ratio 800:1, Speed of response 2ms (grey -> grey), Largest Resolution 1280? 1024 (SXGA), Pxel Pitch 0.294mm and Largest display color approximately 1620 ten thousand colors. Not only the model appears good, it also works well. In addition to two front 5W speakers, ASUS PG191 LCD Monitor loads 15W sub woofer of large output in rear section. SRS TruSurroundXT technology makes it possible to deliver 2.1ch speaker output in 6.1ch.