ThinkVision E22-28 Display size 21.5″ Display area 476.06×267.79 mm Panel IPS Aspect Ratio 16:9 Distinction 1920×1080 Pixel pitch 0.248×0.248 mm Dot/Pixels per inch 102 dpi Viewing angles (H / V) 178 / 178 Response 4ms (Extreme Mod) / 6ms (Normal Mod) Color support 16.7 Million Refresh rate 60 Hz Luminosity 250 nits contrast (ratio) 1000:1 Color Gamut 72% NTSC Curvature No Dim Yes Connectivity HDMI, DP, VGA USB Port No Camera No Microphone No Loudspeakers 2x 1.5W Power Consumption (Typical / Maximum) 13W / 17W Power adapter Integrated Base Tilt, Swivel, Pivot, Height Adjustment Stand Color Black The width of the frame 15 mm Dimensions with stand (HxWxD) 443.4×508.0x178.6 mm / 17.46x20x7.03 inches Weight (with stand) 3.9 kg / 8.6 lbs. Cables included HDMI Environmental certification Energy Star Certified, TCO 8.0, TCO Edge 2.0, EPEAT Silver, RoHS Ergonomic certification T?V Rheinland Flicker Free, T?V Rheinland Eye Comfort Basic warranty 3 years Operating system support Support Windows 7, Windows 10 Sync technology No Tiny / CPU / Platform support No no no Ethernet / Bluetooth / Wireless No no no Touch Screen / Digitizing Pen / Battery No no no RAM / Storage / Card slot No no no