iiyama G-MASTER G4380UHSU-B1 computer monitor 108 cm (42.5") 3840 x 2160 pixels 4K Ultra HD LED Black

Manufacturer: Iiyama | Model: G4380UHSU-B1 | Product ID: 9734
£559.37 (inc. VAT)
Availability: 0 in stock

Product Technical Specification

Display
Display diagonal42.5
Display resolution3840 x 2160
HD type4K Ultra HD
Native aspect ratio16:9
Display technologyLED
Panel typeVA
TouchscreenNo
Display brightness (typical)550
Response time0.4
Display surfaceMatt
Screen shapeFlat screen
Contrast ratio (typical)4000:1
Contrast ratio (dynamic)80000000:1
Maximum refresh rate144
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
High Dynamic Range (HDR) technologyHigh Dynamic Range (HDR) 400
Colour depth10
Performance
NVIDIA G-SYNCNo
AMD FreeSyncYes
AMD FreeSync refresh rate range48 - 120
Flicker-free technologyYes
Low Blue Light technologyYes
Multimedia
Built-in speaker(s)Yes
Built-in cameraNo
Number of speakers2
RMS rated power14
Design
Market positioningGaming
Product colourBlack
Feet colourBlack
Ports & interfaces
Built-in USB hubYes
USB hub version2.0 / 3.2 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
HDMI version2.0
DisplayPorts quantity2
DisplayPort version1.4
Headphone outYes
Headphone outputs1
Headphone connectivity3.5 mm
HDCPYes
Ergonomics
VESA mountingYes
Panel mounting interface200 x 100
Cable lock slotYes
Cable lock slot typeKensington
Height adjustmentNo
Tilt angle range-2 - 10
Tilt adjustmentYes
Power
Energy efficiency class (SDR)F
Energy efficiency class (HDR)G
Energy consumption (SDR) per 1000 hours49
Energy consumption (HDR) per 1000 hours92
Power consumption (typical)85
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)14900
Logistics data
Harmonized System (HS) code85285210

Delivery Options

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FREE
Economy Delivery

Economy Delivery (UK)

Estimated delivery date: Sun 07th Dec 2025 to Wed 10th Dec 2025
Fast & Tracked by Courier
£6.95
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Fast & Tracked by Courier (UK)

Estimated delivery date: Sat 06th Dec 2025 to Mon 08th Dec 2025
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43’’ 4K gaming monitor guaranteeing superb image quality

Packed into a superb VA matrix, the 8.3 million pixels (3840 x 2160) make the G-Master G4380UHSU an ideal screen for PC gamers looking to upgrade to 4K. Featuring 0.4ms MPRT response time and supporting 144Hz over DisplayPort, the monitor allows you to make split second decisions and forget about ghosting effects or smearing issues.

Black Tuner function delivers greater viewing performance in shadowed areas and with FreeSync Premium on board, you can be sure your favourite games will from now on look incredibly crisp and realistic.

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.

FREESYNC™ PREMIUM TECHNOLOGY
This monitor guarantees low input latency and low framerate compensation putting an end to any tearing or stuttering issues at virtually any framerate.

VA PANEL TECHNOLOGY
Guaranteeing excellent contrast ratio making all the nuances between the light and dark colours clearly visible.

BLACK TUNER
The users can adjust the brightness and the dark shades with the Black Tuner, giving greater viewing performance in shadowed areas and helping to spot the enemy earlier.
Display
Display diagonal42.5
Display resolution3840 x 2160
HD type4K Ultra HD
Native aspect ratio16:9
Display technologyLED
Panel typeVA
TouchscreenNo
Display brightness (typical)550
Response time0.4
Display surfaceMatt
Screen shapeFlat screen
Contrast ratio (typical)4000:1
Contrast ratio (dynamic)80000000:1
Maximum refresh rate144
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
High Dynamic Range (HDR) technologyHigh Dynamic Range (HDR) 400
Colour depth10
Performance
NVIDIA G-SYNCNo
AMD FreeSyncYes
AMD FreeSync refresh rate range48 - 120
Flicker-free technologyYes
Low Blue Light technologyYes
Multimedia
Built-in speaker(s)Yes
Built-in cameraNo
Number of speakers2
RMS rated power14
Design
Market positioningGaming
Product colourBlack
Feet colourBlack
Ports & interfaces
Built-in USB hubYes
USB hub version2.0 / 3.2 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
HDMI version2.0
DisplayPorts quantity2
DisplayPort version1.4
Headphone outYes
Headphone outputs1
Headphone connectivity3.5 mm
HDCPYes
Ergonomics
VESA mountingYes
Panel mounting interface200 x 100
Cable lock slotYes
Cable lock slot typeKensington
Height adjustmentNo
Tilt angle range-2 - 10
Tilt adjustmentYes
Power
Energy efficiency class (SDR)F
Energy efficiency class (HDR)G
Energy consumption (SDR) per 1000 hours49
Energy consumption (HDR) per 1000 hours92
Power consumption (typical)85
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)14900
Logistics data
Harmonized System (HS) code85285210

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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).

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Our available delivery options*

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*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.