Flawless Gradation with 10-bit Look-up Table, PA238Q's built-in internal 10-bit Look-up Table can produce greater depth for each RGB colors than 8-bit Look-up Table in conventional monitors. Resulting in smooth gradation and accurate color resolution, QuickFit Virtual Scale, The ASUS-exclusive QuickFit built in the monitor provides real-size document, photo, and grid mode on top of the operating windows on the screen. It can activated via a hotkey on monitor and used as a guide to accurately view and edit photos. Certifications and Standards: UL/cUL, CB, CE, ErP, FCC(Class B), CCC, BSMI, Gost-R, C-Tick, VCCI, TUV-GS, TUV-Ergo, ISO-9241-307, PSB, J-MOSS, WHQL. PA238Q 23' PA238Q Widescreen LCD 1920x1080 HDMI USB is a monitors product made by ASUS monitors and displays.