Marketing Information from the Manufacturer. Manufacturer: Acer, Inc. Manufacturer Part Number: UM.HB7AA.L01. Brand Name: Acer. Product Line: Vero. Product Series: B7. Product Model: B277K L. Product Name: Vero B277K L Widescreen LED Monitor. Product Type: LED Monitor. [Technical Information] Number of Screens: 1. Screen Size Class: 27". Viewable Screen Size: 27". Active Display Area (mm): 597x336. Screen Mode: 4K. Screen Surface: Anti-glare. Panel Technology: In-plane Switching (IPS) Technology. Response Time: 4 ms. Response Time Details: 4ms GTG. Aspect Ratio: 16:9. Pixel Pitch: 6.1 mil. Horizontal Viewing Angle: 178°. Vertical Viewing Angle: 178°. Mount Type: Wall Mountable. Backlight Technology: LED. Maximum Adjustable Height: 5.91". Tilt Angle: -5° to 35°. Swivel Angle: -45° to 45°. Pivot Angle: +/-90°. Features: HDR10. Horizontal Frequency: 30 kHz to 160 kHz - HDMI 2.0. 160 kHz - DisplayPort 1.2. Vertical Frequency: 40 Hz to 60 Hz - HDMI 2.0. 40 Hz to 60 Hz - DisplayPort 1.2. Stand Adjustments: Height. Swivel. Pivot: Yes. Curved Screen: No. Cover Glass: No. Active Display Area (H x V): 23.50" x 13.23". [Video] Maximum Resolution: 3840 x 2160. Maximum Resolution (DisplayPort): 3840x2160@60Hz. Maximum Resolution (HDMI): 3840x2160@60Hz. Standard Refresh Rate: 60 Hz. Color Supported: 1.07 Billion Colors. Color Depth: 8-bit+FRC (10-bit with Dithering). Native Contrast Ratio: 1,000:1. Dynamic Contrast Ratio: 100,000,000:1. Brightness: 350 Nit. Tearing Prevention Technology: FreeSync. Color Gamut: 99% sRGB. [Audio] Number of Speakers: 2.0. Speakers: Yes. Speaker Output Power: 4 W. [Interfaces/Ports] HDMI: Yes. HDMI Version: 2.0. USB: Yes. Headphone: Yes. DisplayPort: Yes. DisplayPort Version: 1.2. Total Number of HDMI Ports: 2. Number of USB 3.2 Ports: 4. Number of USB Type-B Upstream Ports: 1. Number of USB Type-B Downstream Ports: 4. Numbe