iiyama ProLite X4373UHSU-B1 computer monitor 108 cm (42.5") 3840 x 2160 pixels 4K Ultra HD Black

Manufacturer: Iiyama | Model: X4373UHSU-B1 | Product ID: 9766
£493.33 (inc. VAT)
25 in stock
100% Money Back Guarantee - Risk Free

Product Technical Specification

Display
Display diagonal42.5
Display resolution3840 x 2160
HD type4K Ultra HD
Native aspect ratio16:9
Panel typeVA
TouchscreenNo
Display brightness (typical)400
Response time3
Display surfaceMatt
Screen shapeFlat screen
Contrast ratio (typical)4000:1
Contrast ratio (dynamic)80000000:1
Maximum refresh rate60
Viewing angle, horizontal178
Viewing angle, vertical178
Display number of colours1.07 billion colours
Pixel pitch0.245 x 0.245
Horizontal scan range30 - 135
Viewable size, horizontal941.18
Viewable size, vertical529.42
Display diagonal (metric)108
High Dynamic Range (HDR) supportedYes
Performance
NVIDIA G-SYNCNo
AMD FreeSyncNo
Flicker-free technologyYes
Low Blue Light technologyYes
Multimedia
Built-in speaker(s)Yes
Built-in cameraNo
Number of speakers2
RMS rated power14
Design
Market positioningBusiness
Product colourBlack
Feet colourBlack
Ports & interfaces
Built-in USB hubYes
USB hub version3.2 Gen 1 (3.1 Gen 1)
USB upstream port typeUSB Type-B
Number of upstream ports1
USB Type-A downstream ports quantity4
HDMIYes
HDMI ports quantity2
DisplayPorts quantity1
Mini DisplayPorts quantity1
Headphone outYes
Headphone outputs1
HDCPYes
Ergonomics
VESA mountingYes
Panel mounting interface200 x 100
Cable lock slotNo
Height adjustmentNo
Tilt angle range-2 - 10
On Screen Display (OSD)Yes
On Screen Display (OSD) languagesDEU,DUT,ENG,ESP,FRE,ITA,JPN,POL,POR,RUS
Number of OSD languages10
Tilt adjustmentYes
Power
Energy efficiency class (SDR)G
Energy efficiency class (HDR)G
Energy consumption (SDR) per 1000 hours54
Energy consumption (HDR) per 1000 hours102
Power consumption (typical)92
Power consumption (standby)0.5
Power consumption (off)0.5
AC input voltage100 - 240
AC input frequency50 - 60
Input current1.5
Operational conditions
Operating temperature (T-T)5 - 35
Storage temperature (T-T)-20 - 60
Operating relative humidity (H-H)10 - 80
Storage relative humidity (H-H)5 - 85
Packaging content
Stand includedYes
Cables includedAC,DisplayPort,HDMI,USB
Remote control includedYes
Remote control batteries includedYes
Quick start guideYes
Weight & dimensions
Width (with stand)977.5
Depth (with stand)251
Height (with stand)621.5
Weight (with stand)14500
Packaging data
Package width1071
Package depth240
Package height760
Package weight19000
Sustainability
Sustainability certificatesCE,ErP,REACH,RoHS,WEEE
Logistics data
Harmonized System (HS) code85285210

Delivery Options

Economy Delivery
FREE
Economy Delivery

Economy Delivery (UK)

Estimated delivery date: Sun 07th Dec 2025 to Wed 10th Dec 2025
Business Express
£6.95
Business Express

Business Express

Estimated delivery date: Sat 06th Dec 2025 to Mon 08th Dec 2025
View all Delivery Options & International Rates
The ProLite X4373UHSU-B1 is a 43’’ Ultra HD 4K monitor with PbP (picture-by-picture) function allowing for simultaneous display of content from up to four different signal inputs. Divided into four, the screen offers users a dashboard equal to four Full HD displays and no bezel inerrupting your view, whilst saving hassle with multiple cables. The VA panel technology guarantees an impressive view, consistent colour reproduction, superb clarity and wide 178° viewing angles. Flicker free technology and the Blue light reducer functions help to reduce eye fatigue and ensure user comfort even on long days. The HDMI, DisplayPort, USB hub and a headphone connector ensure compatibility across various devices and media platforms. Whether you work with pro editing tools, need a huge canvas for graphs and figures or are in a controlled retail environment, increase your productivity with a single iiyama X4373UHSU.

PBP (PICTURE-BY-PICTURE)
The PbP (picture-by-picture) function allows for simultaneous display of content from up to four different signal inputs. Divided into four, the screen offers users a workplace equal to four Full HD displays put together without the bezel getting in your view and saving you the hassle with extra cables. It’s perfect for a huge range of applications like stock market data, medical desktop publishing, CAD/CAM drawings, graphic and web design.

4K
UHD resolution (3840x2160), better known as 4K, offers a gigantic viewable area with 4 times more information and work space than a Full HD screen. Due to the high DPI (dots per inch), it displays an incredibly sharp and crisp image.

FLICKER-FREE + BLUE LIGHT
The ultimate solution for the comfort and health of your eyes. Flicker-free monitors with the blue light reducer function substantially reduce the strain and fatigue caused by flickering and blue light emittance of regular monitors.

VA MATRIX
VA panel technology offers higher contrast, darker blacks and much better viewing angles
than standard TN technology. The screen will look good no matter what angle you look at it.

SPEAKERS
This LED monitor is equipped with two high quality stereo speakers.
Display
Display diagonal42.5
Display resolution3840 x 2160
HD type4K Ultra HD
Native aspect ratio16:9
Panel typeVA
TouchscreenNo
Display brightness (typical)400
Response time3
Display surfaceMatt
Screen shapeFlat screen
Contrast ratio (typical)4000:1
Contrast ratio (dynamic)80000000:1
Maximum refresh rate60
Viewing angle, horizontal178
Viewing angle, vertical178
Display number of colours1.07 billion colours
Pixel pitch0.245 x 0.245
Horizontal scan range30 - 135
Viewable size, horizontal941.18
Viewable size, vertical529.42
Display diagonal (metric)108
High Dynamic Range (HDR) supportedYes
Performance
NVIDIA G-SYNCNo
AMD FreeSyncNo
Flicker-free technologyYes
Low Blue Light technologyYes
Multimedia
Built-in speaker(s)Yes
Built-in cameraNo
Number of speakers2
RMS rated power14
Design
Market positioningBusiness
Product colourBlack
Feet colourBlack
Ports & interfaces
Built-in USB hubYes
USB hub version3.2 Gen 1 (3.1 Gen 1)
USB upstream port typeUSB Type-B
Number of upstream ports1
USB Type-A downstream ports quantity4
HDMIYes
HDMI ports quantity2
DisplayPorts quantity1
Mini DisplayPorts quantity1
Headphone outYes
Headphone outputs1
HDCPYes
Ergonomics
VESA mountingYes
Panel mounting interface200 x 100
Cable lock slotNo
Height adjustmentNo
Tilt angle range-2 - 10
On Screen Display (OSD)Yes
On Screen Display (OSD) languagesDEU,DUT,ENG,ESP,FRE,ITA,JPN,POL,POR,RUS
Number of OSD languages10
Tilt adjustmentYes
Power
Energy efficiency class (SDR)G
Energy efficiency class (HDR)G
Energy consumption (SDR) per 1000 hours54
Energy consumption (HDR) per 1000 hours102
Power consumption (typical)92
Power consumption (standby)0.5
Power consumption (off)0.5
AC input voltage100 - 240
AC input frequency50 - 60
Input current1.5
Operational conditions
Operating temperature (T-T)5 - 35
Storage temperature (T-T)-20 - 60
Operating relative humidity (H-H)10 - 80
Storage relative humidity (H-H)5 - 85
Packaging content
Stand includedYes
Cables includedAC,DisplayPort,HDMI,USB
Remote control includedYes
Remote control batteries includedYes
Quick start guideYes
Weight & dimensions
Width (with stand)977.5
Depth (with stand)251
Height (with stand)621.5
Weight (with stand)14500
Packaging data
Package width1071
Package depth240
Package height760
Package weight19000
Sustainability
Sustainability certificatesCE,ErP,REACH,RoHS,WEEE
Logistics data
Harmonized System (HS) code85285210

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Buykingston order despatch times:

We will despatch your order the very same day if we receive cleared payment by 12:00 pm Mon-Fri.

These delivery estimates apply when you order up to 12:00 pm Mon-Fri (excluding public holidays).

We charge a one off delivery cost as outlined below regardless of how many items you order or the weight of your order.

Estimated delivery times are provided to us by the respective delivery companies. We pass this information onto you, the customer.

Despatch times do not apply to UK public holidays.

Estimated delivery times are taken from the next available working day available for delivery. For example if an order was despatched on a working Wednesday by 3pm, the first available working day for delivery would be Thursday provided you placed your order by 3pm on the Wednesday. If the next available weekday is a UK bank holiday/public holiday then your order will be despatched on the next available working day.

Our warehouse reserves the right to upgrade the delivery method you select on your order.

Our available delivery options*

Contact us for a shipping quote.

*All delivery times are estimated unless stated.

Product Returns Note

Buykingston offers a very flexible and hassle free returns policy. If for whatever reason you are not happy with the item purchased you can return it to us within 12months for a refund (for unused and unopened items) or within 30 days on opened and used items for a refund. This applies to items purchased direct through Buykingston  only.

Our 30 Day Returns Money Back Guarantee Satisfaction Guarantee:
For items opened and used and that are returned in a resellable condition.

Our 365 Day Returns Money Back Guarantee Satisfaction Guarantee:
For items that remain sealed and unused.

Some items are excluded from our moneyback guarantee unless they have developed a fault. These include;

- Headphones
- Earphones
- Custom made and designed products such as flash memory products with custom logo’s on them. E,g USB flash drives and memory cards with your own logo

Returns FAQs

What is your returns criteria?
On opened items 30 days from date of receipt or expected date of receipt on non tracked items.
On unopened items 365 days.

How do i go about returning my order?
Please contact us via our contact page with your order number where we will present you with an RMA number and returns label.

Do i need to contact you before returning my order?
Yes, to obtain an RMA number.

Does my item have to include its original packaging?
Yes for items that fall within our 30 day money back guarantee and our 365 day returns. Of course for faulty items we realise you may no longer have the packaging.

Who deals with the warranty on a faulty item?
We will. In some circumstances we may ask you to contact the manufacturer direct for assistance.

Please ensure you have read and comply in full with Section 11 & 13 of our terms and conditions which you can read here in full.