Computer monitor DAHUA F400N 55 inch (139.7 cm) 4K UHD 3840×2160 IPS LED, 8 ms, 400 cd/m², USB hub, speakers, VESA, black

Dahua Technology F400N is a 55" (139.7 cm) 4K Ultra HD LED monitor with an IPS panel designed for continuous use. It delivers 3840 x 2160 resolution at a 16:9 aspect ratio, wide 178°/178° viewing angles and integrated speakers. The monitor features a slim, ultra-narrow bezel and supports multiple signal interfaces including HDMI, VGA and USB. VESA mounting and a built-in USB hub increase installation flexibility for professional and commercial environments.

Advantages

The IPS panel ensures consistent colour reproduction and wide viewing angles, while 4K Ultra HD resolution provides high image detail. Flicker-free technology and an 8 ms response time minimize visual artifacts like motion blur and judder. With 400 cd/m² brightness and a 1200:1 contrast ratio the display maintains clear visibility in varied lighting conditions. Built-in speakers and multiple input options simplify setup and daily operation.

Suitable for

• Control rooms and security monitoring where 24/7 operation is required
• Conference rooms and meeting displays
• Digital signage and public information screens
• Office workstations requiring high-resolution reference displays

Key specifications

• Display diagonal: 139.7 cm (55")
• Resolution: 3840 x 2160 (4K Ultra HD), 16:9
• Panel type: IPS (suitable for continuous 24/7 operation)
• Display technology: LED
• Response time: 8 ms
• Viewing angles: 178° horizontal / 178° vertical
• Brightness (typical): 400 cd/m²
• Contrast ratio (typical): 1200:1
• Refresh rate: 60 Hz
• Built-in speaker(s) and USB hub
• Interfaces: HDMI, VGA, USB (and other common signal inputs)
• Mounting: VESA compatible
• Colour: Black
• Energy efficiency class (SDR): F

How to use

Place and mount the Dahua F400N on a stable surface or attach it to a VESA-compatible mount. Connect the preferred video source using HDMI, VGA or USB, and connect power. Use the on-screen menu to adjust brightness, contrast, input source and audio settings. For continuous operation, ensure adequate ventilation around the monitor and follow local electrical safety guidelines.

Recommendations

For reliable 24/7 performance, install the monitor in a well-ventilated location, avoid direct sunlight on the screen, and perform periodic checks of cables and mounting hardware. Use the built-in picture settings to match ambient lighting and content type for optimal visibility.