Viewable Screen Size:  54.6 cm (21.5") Aspect Ratio:  16:9 Response Time:  1 ms VRB Backlight Technology:  LED Horizontal Viewing Angle:  178° Vertical Viewing Angle:  178° Panel Technology:  In-plane Switching (IPS) Technology Frequency (Horizontal/Vertical):  30KHz-85KHz/48Hz-75Hz Pixel Pitch:  0.25 mm Tilt Angle:  -5° to 15° Maximum Adjustable Height:  No