What kind of monitor do you use when playing games or working?
The “Jlink D34QR4K” reviewed here features a high WQHD resolution, a 144Hz high refresh rate, and an ultra-wide curved display. This makes it a monitor we can highly recommend not only for general work, but also for those who need a large amount of information at once—such as in FPS games—or those playing games where victory or defeat is decided in a fraction of a second!
Written by “Mr. Gadget”
- Studied under Masatoshi Ono, a million-selling singer with experience performing at Kohaku Uta Gassen
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I look forward to sharing my reviews with you!

- 曲面ウルトラワイドディスプレイ
- WQHDの鮮明なディスプレイ
- HDR対応
- 144Hzと高いリフレッシュレート
- 21:9とワイドなアスペクト比
- 狭いベゼル
- 一通り揃っているインターフェース
- 電源アダプターがでかい
- 取扱説明書が大雑把
Basic Information
What kind of manufacturer is Jlink?
Jlink is a monitor manufacturer headquartered in Guangdong, China.
They primarily develop and sell high-performance, low-priced gaming monitors, and have expanded into overseas markets such as Japan and the United States.
They offer monitors with distinctive designs such as curved and ultra-wide form factors, along with exceptional performance features like high resolution and a high refresh rate, creating a comfortable environment that allows users to focus on gaming and work.

Specs
| Display Size | 34 inches |
| Panel | VA, curved, anti-glare |
| Aspect Ratio | 21:9 |
| Resolution | 3440×1440 (WQHD) |
| HDR | Supported |
| Refresh Rate | 144 Hz |
| Viewing Angle | 178 degrees |
| Brightness | 400 cd/m² |
| Contrast Ratio | 4000:1 |
| Speakers | Built-in |
| Dimensions | 81.2 x 36.7 x 1.5 cm | Weight | Approx. 11kg |
| Interfaces | ・HDMI 2.0 x 2 ・USB-UP x 1 ・USB x 1 ・LAN port x 1 ・DisplayPort (DP1.4) x 1 ・3.5mm audio jack x 1 ・Type-C port x 1 ・Power port | Adjustment Range | ・Left/Right: 20° ・Up/Down: 90mm (±5mm) ・Tilt: -5° to 20° |
- Curved Ultra-Wide Display
- 3440 x 1440P Resolution
- HDR Support
- High 144Hz Refresh Rate
- 21:9 Aspect Ratio
- Beautiful Black VA Panel
Included Items



- Monitor Body
- Monitor Stand
- Base
- DP Cable
- Power Cord
- Power Adapter
- 3 Screws
Review
The power adapter is huge

Mr. GadgetTo be frank, the power adapter is large and gets in the way.
Installation is easy.However, we would like more detailed instructions in the user manual.



Align the tabs and holes securely when connecting



Mr. GadgetAttaching the base and stand was easy, but personally, I struggled a bit with attaching the stand to the main unit…
By the way, the user manual does not provide detailed instructions on how to install it.
While this might be fine for those who are used to assembling monitors, caution is needed for those who are not.
The Interfaces Are Reasonably Well-Equipped


As mentioned when introducing the specifications, the detailed interfaces are as follows.
- HDMI 2.0 × 2
- USB-UP × 1
- USB × 1
- LAN port × 1
- DisplayPort (DP1.4) × 1
- 3.5mm audio jack × 1
- Type-C port × 1
- Power port

Mr. GadgetPretty much all the commonly used ports are included!
Range of Motion
- Left/Right: 20°
- Up/Down: 90 mm (±5 mm)
- Tilt: -5° to 20°
You can adjust the monitor angle as shown in the photos below.


The monitor height can also be adjusted in the same way.

A gaming-inspired rear panel






Mr. GadgetThough since it’s on the back, you can’t see it at all (laughs).
Monitor settings are cumbersome
Monitor settings and power on/off are controlled using this function button located on the back of the monitor.

Pressing this function button once brings up the monitor settings menu.
Additionally, as shown in the image below, pressing it to the left is assigned to BACK, and pressing it to the right is assigned to ENTER.







Mr. GadgetIt was kind of a pain having to reach around to the back of the monitor every time I wanted to change a setting.
Mediocre Speaker Sound Quality

There are two speakers built into the bottom of the monitor and one on the upper rear.
While there’s nothing particularly frustrating about them for normal use, if you ask whether the sound quality is good, it isn’t.
I doubt anyone is expecting high sound quality from this monitor, but personally, I think you’re better off buying external speakers.
A Display Capable of Vivid Rendering


Mr. GadgetIt’s quite hard to convey fully even through photos, but just for reference…
It renders images so beautifully that I had zero complaints regarding resolution or color reproduction!
Curved Ultrawide Displays Are Amazing
First of all, at 34 inches it is tremendously wide, allowing you to work with a two-screen or three-screen layout.

Mr. GadgetI was able to work across multiple windows without feeling any awkwardness!
Also, because it’s a curved display, your field of view expands and the strain of shifting your gaze is reduced!



The bezels are also narrow, making it easier to focus on gaming and work.
Mr. GadgetHaving narrow bezels is surprisingly an important aspect.
Since the amount of information that can be displayed at once varies depending on the bezel size, I think it’s a huge advantage for people who play FPS games!
High refresh rate: 144Hz!
As we mentioned when introducing the specifications, the “Jlink D34QR4K” supports 144Hz.
Mr. GadgetWe were amazed by the smooth visuals!
Also, a high refresh rate is indispensable for split-second gaming, making 144Hz a welcome feature!
Conclusion
High overall perfection!
After using the “Jlink D34QR4K” this time, we felt that it doesn’t have any major weaknesses.
It has both high resolution and a high refresh rate, and even includes built-in speakers.
Additionally, the interface is well-equipped.
And above all, the curved ultrawide display is the defining feature of this monitor.
With few drawbacks and many advantages, we think this is a monitor we can recommend to anyone!
However, these advantages are best utilized when playing games like FPS titles, so it is especially recommended for those who play such games!

- 曲面ウルトラワイドディスプレイ
- WQHDの鮮明なディスプレイ
- HDR対応
- 144Hzと高いリフレッシュレート
- 21:9とワイドなアスペクト比
- 狭いベゼル
- 一通り揃っているインターフェース
- 電源アダプターがでかい
- 取扱説明書が大雑把
Recommended For
- Those looking for a curved or wide monitor with few drawbacks
- Those who play FPS games and similar titles
- Those who want a curved wide monitor with high resolution and a high refresh rate
Thank you very much for reading to the end!
- Product prices and information are current as of the time of writing.
- Please note that this site assumes no responsibility whatsoever for any errors in this information.
- Product and service names mentioned on this site are trademarks of their respective companies.
This article was originally written in Japanese and has been translated.



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