ProLite X4373UHSU-B2
43" large format desktop monitor with 4K resolution, giving you the power of four displays in one
Designed for professionals who need more screen space, the ProLite X4373UHSU offers a seamless solution for multitasking and multi-device workflows. The 43'' panel delivers rich colours, sharp 3840x2160 resolution and wide 178° viewing angles, with 450cd/m² brightness ensuring excellent visibility in any lighting. For added flexibility, the monitor supports dual mode, allowing you to work in 3840×2160 for detailed content creation and data-heavy applications, or switch to 1920×1080 at 120Hz for smoother motion when displaying dynamic content or live feeds.
The USB-C input with 95W Power Delivery, integrated KVM switch and four-port USB hub make it easy to connect, control and charge multiple devices through a single setup. Flicker-free technology and a blue light reducer help minimise eye strain during long sessions, while the included remote control offers instant access to key settings.
Ideal for content creation, financial dashboards or control environments, this all-in-one monitor maximises clarity, comfort and productivity.
Adapt your display to match your pace
Switch seamlessly between two optimised modes to suit the task at hand. Dual Mode empowers your workflow by offering crystal-clear 4K resolution for precise data work, or a responsive 120Hz Full HD setting for smooth motion during live feeds and dynamic content. One screen with two smart ways to stay productive, without compromise
Deeper blacks and richer detail with VA panel
The VA panel offers exceptional contrast and deep blacks, revealing every nuance between light and dark. Enjoy vivid, lifelike images with minimal light bleed and excellent color depth, especially in darker scenes. Whether watching movies, editing content, or gaming, benefit from consistent picture quality and wide viewing angles that bring every detail to life.
Easy multi-device control with KVM
Easily switch between multiple computers using one monitor, keyboard, and mouse, making multitasking smooth and efficient.
Built-in audio without extra clutter
Enjoy clear, pleasant sound for calls, videos, and music while keeping your desk free of extra speakers, thanks to the integrated audio.
Double the view, double efficiency
Watch two sources at once. Use Picture-in-Picture to overlay a second feed or Picture-by-Picture to split the screen side by side. Perfect for multitasking, comparing content, or staying in control.
Reduced eye strain & fatigue
Work, study or play for longer with greater visual comfort. The Blue Light Reducer feature lets you lower blue light emissions through software settings, helping minimise eye strain during extended screen time. Combined with flicker-free technology, it supports a more comfortable viewing experience so you can stay focused throughout the day.
Video
Technical specification
DISPLAY CHARACTERISTICS
| Diagonal | 42.5", 108cm |
| Panel | VA LED matrix |
| Native resolution | 3840 x 2160 @60Hz (DisplayPort, DP&HDMI, 8.2 megapixel 4K UHD 3840 × 2160 60Hz (Dual Mode – 1920 × 1080 120Hz)) |
| Aspect ratio | 16:9 |
| Panel brightness | 450 cd/m² |
| Static contrast | 4000:1 |
| Advanced contrast | 80M:1 |
| Response time (GTG) | 3ms |
| Viewing zone | horizontal/vertical: 178°/178°, right/left: 89°/89°, up/down: 89°/89° |
| Colour support | 1.07B 10bit (8bit + Hi-FRC) (sRGB 100%, NTSC: 85%) |
| Horizontal Sync | 30 - 135kHz |
| Viewable area W x H | 941.18 x 529.42mm, 37.1 x 20.8" |
| Pixel pitch | 0.245mm |
| Colour | matte, black |
INTERFACES / CONNECTORS / CONTROLS
| Signal input |
HDMI x2 (v.2.0) DisplayPort x1 (v.1.2) USB-C x1 (DP Alt Mode, PD 95W) |
| USB HUB | x4 (2x Type-A v.3.2 Gen 1 (5Gbps, 4.5W) 2x Type-C (5Gbps, 5W)) |
| HDCP | yes |
| Headphone connector | yes |
FEATURES
| KVM switch | yes |
| Blue light reducer | yes |
| Flicker free | yes |
| Extra | headphone hook, remote control |
| HDR | yes, HDR10 |
| OSD languages | EN, DE, FR, ES, IT, PT, RU, JP, NL, PL, UA |
| Control buttons | Input Select, +/Volume, -/Shortcut, Menu, Power |
| User controls | picture adjust (brightness, contrast, ECO, HDR, ACR, OD, X-res technology, black tuner), colour settings (6-axis, i-Style colour, blue light reducer, gamma, RGB range, colour temperature, user preset), PiP/PbP ( PiP/PbP, sub-source, PiP position, PiP size, swap, audio input), OSD (OSD H. position, OSD V. position, OSD time, OSD background, display information, language), miscellaneous (sharpness, video mode adjust, opening logo, power LED, USB-C speed, USB charge, KVM, DDC/CI control, dual mode), input select (source), audio settings (volume, mute audio), recall (recall all?) |
| Speakers | 2 x 7W |
| Convenience | Kensington-lock™ prepared, DDC/CI, DDC2B, Mac OSX |
MECHANICAL
| Display position adjustments | tilt |
| Tilt angle | 10° up; 2° down |
| VESA mounting | 200 x 100mm |
ACCESSORIES INCLUDED
| Cables | power (1.8m), USB (1.8m), HDMI (1.8m), DP (1.8m), USB-C (1.0m) |
| Other | quick start guide, safety guide |
| Remote control | yes (batteries included) |
POWER MANAGEMENT
| Power supply unit | internal |
| Power supply | AC 100 - 240V, 50/60Hz |
| Power usage | 41W typical, 0.5W stand by, 0.5W off mode |
SUSTAINABILITY
| Regulations | CE, TÜV-Bauart, EAC, RoHS support, ErP, WEEE, VCCI, REACH, UKCA |
| Energy efficiency class (Regulation (EU) 2017/1369) | E |
| REACH SVHC | above 0.1%: Lead |
DIMENSIONS / WEIGHT
| Product dimensions W x H x D | 977.5 x 621.5 x 251mm |
| Box dimensions W x H x D | 1071 x 760 x 240mm |
| Weight (without box) | 14.7kg |
| Weight (with box) | 19.3kg |
| EAN code | 4948570126590 |
Downloads
| User manual | X4373UHSU-B2-usermanual-ua-RevB.pdf | Download |
| Technical specification | ProLite X4373UHSU-B2 - ua_en.pdf | Download |
| Drawing | X4373UHSU-B2_DIM.pdf | Download |
| EU Energy Label | X4373UHSU-B2 EU Energy Label (2518811).pdf | Download |
| UK Energy Label | X4373UHSU-B2 UK Energy Label (2518811).pdf | Download |
| Guarantee label | X4373UHSU-B2.pdf | Download |
FAQS
Is Adaptive Sync compatible with AMD FreeSync or NVIDIA G-Sync?
+Yes, Adaptive Sync is compatible with AMD FreeSync and NVIDIA G-Sync.
Why can't I select MBR when FreeSync/Adaptive Sync is activated?
+MBR cannot be selected when FreeSync/AdaptiveSync is activated, because MBR can interfere with the FreeSync/Adaptive Sync technology as they have different methods of improving motion clarity. MBR reduces motion blur (response time), while Adaptive Sync/FreeSync addresses stuttering. We recommend activating Adaptive Sync/FreeSync on systems with fluctuating or unstable frame rates. MBR performs best on powerful systems that maintain a consistently high frame rate.
Why is my monitor displaying a "No Signal" message?
+If your monitor is displaying a "No Signal" message, please check the following:
1. Ensure the cables are properly connected at both ends.
2. Select the correct signal input (HDMI/DP) or choose AUTO.
For guidance on selecting an input while the screen is in standby mode, please consult the user manual. On desktop monitors, common methods include pressing the INPUT, AUTO, or "2" buttons, or moving the joystick backward.
I have an Apple MAC-system, will my iiyama monitor work?
+Yes, your iiyama monitor will work with your Apple Mac system. However, it depends on the signal input how to connect. Since Apple Mac systems from 2020 onwards only have Thunderbolt 3 (USB-C) ports for video output, you have two options:
1. Connect directly to the USB-C signal input on your iiyama monitor.
2. In case your monitor only has HDMI or Displayport, you will need a Mac-compatible dongle that supports one of the video inputs available. Apple offers a USB-C Digital AV Multiport Adapter (MW5M3AM) that can be used for this purpose.
The picture on my monitor is flickering. What steps can I take to fix it?
+To resolve the issue of a blinking picture, please follow these steps:
1. Inspect the Signal Cable.
Ensure the signal cable is securely connected at both ends and free from any physical damage. Avoid any sharp bends or squishing of the cable.
2. Use a Shorter Cable.
If possible, use a cable shorter than 3 meters and connect the monitor directly to a wall power socket, avoiding the use of adapters.
3. Disable FreeSync/Adaptive Sync.
For desktop or gaming monitors, try disabling FreeSync or Adaptive Sync in the monitor's settings menu.
