iiyama ProLite X4373UHSU-B2 computer monitor 108 cm (42.5") 3840 x 2160 pixels 4K Ultra HD LED Black

43" large format desktop monitor with 4K resolution, giving you the power of four displays in one

Reasons To Buy

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 longer without eye fatigue, thanks to flicker-free technology and reduced blue light emissions. These features help minimize eye strain and improve visual comfort, allowing you to stay focused and productive throughout the day.

Description

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.

Specifications

Display
HDCP	Yes
Display brightness (typical)	450 cd/m²
Screen shape	Flat
Display number of colours	1.07 billion colours
Native aspect ratio	16:9
Maximum refresh rate	60 Hz
sRGB coverage (typical)	100%
HD type	4K Ultra HD
Display technology	LED
Contrast ratio (dynamic)	80000000:1
Viewing angle, horizontal	178°
Viewing angle, vertical	178°
Pixel pitch	0.245 x 0.245 mm
Horizontal scan range	30 - 135 kHz
Viewable size, horizontal	94.1 cm
Viewable size, vertical	52.9 cm
Display resolution	3840 x 2160 pixels
Response time	3 ms
Display diagonal	108 cm (42.5")
Contrast ratio (typical)	4000:1
NTSC coverage (typical)	85%
Touchscreen	No
High Dynamic Range (HDR) supported	Yes
Panel type	VA
Colour depth	10 bit
High Dynamic Range (HDR) technology	High Dynamic Range 10 (HDR10)
Display diagonal (metric)	108 cm
Colour gamut standard	NTSC, sRGB
Response time measurement type	GTG (Gray to Gray)
Audio
Built-in speaker(s)	Yes
RMS rated power	14 W
Performance
Built-in speaker(s)	Yes
RMS rated power	14 W
Built-in camera	No
Low Blue Light technology	Yes
Flicker-free technology	Yes
Management features
On Screen Display (OSD)	Yes
On Screen Display (OSD) languages	German, English, Spanish, French, Italian, Japanese, Dutch, Polish, Portuguese, Russian, Ukrainian
Multimedia
Number of speakers	2
Built-in speaker(s)	Yes
RMS rated power	14 W
Built-in camera	No
Power
Power cable length	1.8 m
Power supply type	Internal
AC input voltage	100 - 240 V
AC input frequency	50/60 Hz
Power consumption (standby)	0.5 W
Power consumption (typical)	41 W
Power consumption (off)	0.5 W
Energy efficiency scale	A to G
Energy efficiency class (SDR)	E
Energy efficiency class (HDR)	G
Energy consumption (SDR) per 1000 hours	41 kWh
Energy consumption (HDR) per 1000 hours	79 kWh
Design
Market positioning	Business
Product colour	Black
Camera
Built-in camera	No
Ports & interfaces
Built-in USB hub	Yes
USB hub version	3.2 Gen 1 (3.1 Gen 1)
USB upstream port type	USB Type-A, USB Type-C
Headphone out	Yes
HDMI ports quantity	2
DisplayPorts quantity	1
HDCP	Yes
HDMI	Yes
HDMI version	2.0
DisplayPort version	1.2
USB Power Delivery (USB PD)	Yes
USB Power Delivery up to	95 W
Built-in KVM switch	Yes
Number of downstream ports	4
Technical details
Cable lock slot	Yes
HDMI	Yes
Product colour	Black
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?)
Sustainability certificates	ErP
Compliance certificates	CE, EAC, REACH, RoHS, TÜV mark, UKCA, VCCI, WEEE
Packaging content	quick start guide, safety guide
Power supply type	Internal
Weight (with stand)	14.7 kg
Touchscreen	No
Ergonomics
Wall mountable	Yes
VESA mounting	Yes
Cable lock slot	Yes
Panel mounting interface	200 x 100 mm
Tilt angle range	2 - 10°
On Screen Display (OSD)	Yes
On Screen Display (OSD) languages	German, English, Spanish, French, Italian, Japanese, Dutch, Polish, Portuguese, Russian, Ukrainian
Height adjustment	No
Cable lock slot type	Kensington
Cable management	Yes
Tilt adjustment	Yes
Weight & dimensions
Width (with stand)	977.5 mm
Depth (with stand)	251 mm
Height (with stand)	621.5 mm
Weight (with stand)	14.7 kg
Package width	1071 mm
Package depth	240 mm
Package height	760 mm
Package weight	19.3 kg
Width	977.5 mm
Weight	14.7 kg
Height	621.5 mm
Depth	251 mm
Packaging data
Package width	1071 mm
Package depth	240 mm
Package height	760 mm
Package weight	19.3 kg
Package type	Box
USB cable length	1.8 m
Power cable length	1.8 m
Remote control included	Yes
Cables included	AC, USB, HDMI, DisplayPort, USB Type-C
DisplayPort cable length	1.8 m
HDMI cable length	1.8 m
Remote control batteries included	Yes
Packaging content
Power cable length	1.8 m
Remote control included	Yes
Cables included	AC, USB, HDMI, DisplayPort, USB Type-C
DisplayPort cable length	1.8 m
HDMI cable length	1.8 m
Remote control batteries included	Yes
USB cable length	1.8 m
Sustainability
Sustainability certificates	ErP
Other features
Packaging content	quick start guide, safety guide
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?)
Width	977.5 mm
Weight	14.7 kg
Height	621.5 mm
Depth	251 mm
Compliance certificates	CE, EAC, REACH, RoHS, TÜV mark, UKCA, VCCI, WEEE
Control panel	Input Select, +/Volume, -/Shortcut, Menu, Power
Remote control included	Yes
HDMI	Yes
USB Power Delivery up to	95 W
Energy efficiency scale	A to G
Power supply type	Internal
Power cable length	1.8 m
Touchscreen	No
USB Power Delivery (USB PD)	Yes
Package type	Box