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  • 34" UltraWide QHD (3440 x 1440) IPS Display
  • Ergo Stand (Extend/Retract/Swivel/Height/Tilt)
  • 3-Side Virtually Borderless Design
  • sRGB 99% Color Gamut / HDR10
  • AMD FreeSync™
  • Color Calibrated
34" UltraWide Ergo QHD IPS HDR Monitor with FreeSync™
$ 599.99
#1 UltraWide monitor brand in the U.S. for 3 years in a row*

#1 UltraWide monitor brand in the U.S. for 3 years in a row*

*The NPD Group, Inc., U.S. Weekly Retail Tracking Service, Monitors, Aspect ratio: 21:9, Based on Dollars & Units, 52 Weeks Ending Apr 4, 2020 vs. same weeks in 2018 & 2019.
34" 21:9 UltraWide™ QHD

Wider View to Get More Done

See more, do more. The 34-inch UltraWide® QHD (3440x1440) resolution allows you to edit clips of footage and simultaneously run different programs. You can edit, code and review, while enjoying the immersive and clear visual experience on a rich, vivid IPS screen that's accurate at wide angles.
*This image is simulated to help you understand.
  • Extend / Retract 0~180mm

  • Swivel ± 280˚

  • Height 0~130mm

  • Tilt ± 25˚

*The figures above are the available range of features.
*The product images in the video are for illustrational purposes only and might differ from the real product.
*For detailed installation instructions, see the product manual at LG.com Support page.
*All product images shown in above videos are illustrated by a representative product of LG for demonstration purposes and might differ partially from the real product.
*To download the latest OnScreen Control, visit LG.COM.
*The product images and OnScreen Control in the video are for illustrational purposes only and might differ from the real product and Actual OnScreen Control.
*This image is simulated to help you understand.


    • Size:
    • 34"
    • Display Type
    • IPS
    • Response Time
    • 5ms (GTG)
    • Refresh Rate
    • 75Hz
    • Display Resolution:
    • UW-QHD
    • Color Gamut (Typ.)
    • sRGB 99% (CIE1931)
    • Color Depth (Number of Colors)
    • 16.7M
    • Pixel Pitch (mm)
    • 0.2325 x 0.2325 mm
    • Aspect Ratio
    • 21:9
    • Resolution
    • 3440 x 1440
    • Brightness
    • 300cd/m²
    • Contrast Ratio
    • 1000:1
    • Viewing Angle
    • 178º (R/L), 178º (U/D)
    • Surface Treatment
    • Anti-Glare


    • HDMI
    • Yes x 2
    • DisplayPort
    • Yes x 1
    • Headphone Out
    • Yes
    • USB Up-stream
    • Yes x 1
    • USB Down-stream
    • Yes x 2


    • Type
    • Adapter
    • Input
    • 100 ~ 240Vac, 50/60Hz
    • Power Save/Sleep Mode (Max.):
    • Less than 0.5W
    • DC Off (Max.):
    • Less than 0.3W
    • Power Consumption (Typ.)
    • 45W
    • Power Consumption (Max.)
    • 67W


    • Color Calibrated
    • Yes
    • Color Weakness Mode
    • Yes
    • Adaptive Sync
    • AMD FreeSync™
    • Black Stabilizer®
    • Yes
    • Dynamic Action Sync®
    • Yes
    • Flicker Safe
    • Yes
    • Smart Energy Saving
    • Yes
    • Reader Mode
    • Yes
    • Super Resolution+
    • Yes
    • Dual Controller
    • Yes
    • OnScreen Control (OSC)
    • Yes
    • HDR (High Dynamic Range)
    • Yes (HDR10)
    • HDR Effect
    • Yes


    • Speaker
    • Yes
    • Speaker Output
    • 7W x 2
    • Maxx Audio
    • Yes


    • With Stand (WxHxD)
    • 32.2" x 24.1" x 16.0" (Up)/32.2"x 18.9" x 16.0" (Down)
    • Without Stand (WxHxD)
    • 32.2” x 14.4” x 1.8”
    • Shipping Dimensions (WxHxD)
    • 37.0” x 20.3” x 10.6”
    • With Stand Weight
    • 23.8 lbs
    • Without Stand Weight
    • 15.2 lbs
    • Shipping Weight
    • 33.5 lbs


    • Ergo Stand
    • Yes (Tilt/Height/Swivel/Extend/Retract)


    • Wall Mount Size (mm) :
    • 100 x 100 mm
    • HDMI
    • Yes
    • Others (Accessory)
    • DC Extension cable 3.9 ft Black w/ Holder


    • 2020 Model
    • Yes


    • Limited Warranty
    • 1 Year Parts and Labor
    • UPC
    • 195174002919

What people are saying

Rated 5 out of 5 by from Great for multitasking As a software developer I have multiple programs and windows open. Having the ultrawide is perfect for multitasking and splitting up the screen!
Date published: 2022-10-11
Rated 5 out of 5 by from Great monitor Overall picture quality is amazing for such a wide screen. Setup was very easy. The mounting bracket provides A LOT of extra deck space. My only dislike I have regardining monitor is that you can not adjust volume through your computer or connect device.
Date published: 2022-10-06
Rated 1 out of 5 by from Arrived Defective I bought this on Feb. 23rd 2022 from Amazon. It arrived timely. The included power cable extension did not work. I worked with support to request a replacement. They indicated that it would take 7-10 days to receive. It is now April 3rd and I have not received the replaced. Additionally, the monitor will occasionally glitch out and fail only displaying static pixels, requiring a restart of the monitor. This solves the issue but is incredibly annoying, especially during conference calls.
Date published: 2022-04-04
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In Stock
Sold and Fulfilled by LG
  • Free Shipping*


Ask your questions. Share your answers.
Please review the detailed product information and help guides in the
Product Support section for this product prior to posting a question.

Can you use a third party monitor arm? Is it VESA?

Asked by: Webweaverman
The LG 34'' UltraWide Ergo QHD IPS HDR Monitor with FreeSync™, Model # 34WN780-B is a VESA Compliant monitor that has a VESA Mount Pattern of 100 x 100 mm. Any VESA Compliant third-party monitor arm regardless of brand or manufacturer that supports the monitor's VESA Mount pattern can be used with the monitor...^Ivan
Answered by: Ivan4826
Date published: 2022-10-07

My desk thickness is 4 inches, will the C-Clamp fit ?

Asked by: Kaisede
4" is too thick. The c-clamp for the LG 34'' UltraWide Ergo QHD IPS HDR Monitor with FreeSync™, Model # 34WN780-B can be used with tables less than 3.5 inches thick (1.1" to 3.5" thick)...^Ivan
Answered by: Ivanf
Date published: 2022-06-18

Am I able to connect different laptops like my Macbook and my Surface pro to the monitor to work on?

Asked by: J Mitch
Connectivity for the LG 34'' UltraWide Ergo QHD IPS HDR Monitor with FreeSync™, Model # 34WN780-B includes 2 x HDMI inputs and a DisplayPort input that you can connect external devices to. You will need to manually switch the inputs to display the input that you want to view on the monitor...^Ivan
Answered by: Ivanf
Date published: 2022-01-27

Is it possible to work on two open excel spreadsheets at the same time with this monitor?

Asked by: J Mitch
You can either use the Screen Split function provided by Windows OS or Mac OS depending on which OS the PC/Laptop that you have that is connected to the LG 34'' UltraWide Ergo QHD IPS HDR Monitor with FreeSync™, Model # 34WN780-B is running, or you can download and install LG's On-Screen Control (OSC) software from the monitor's support page on our site which will give you options for a full screen, 3 options for a 2 Screen Split, 5 options for a 3 Screen Split, 1 option for a 4 Screen Split and 4 options for PIP (Picture-in-Picture). See the OnScreen Control video in the overview section on the monitor's product detail page on our site...^Ivan
Answered by: Ivanf
Date published: 2022-01-27

Is this the same exact stand that comes with the LG 27UN880-B? If the same ergo stand accommodates the 27" monitor and the UltraWide 34" monitor, I'd like to know if I could use the stand that came with my LG 27UN880-B to mount the LG 34BK95U-W monitor.

Asked by: Frenchman99
Neither the Ergo stand for the LG 27'' UltraFine UHD IPS USB-C HDR Monitor with Ergo Stand, Model # 27UN880-B nor that for the LG 32UN880-B 32 Inch UltraFine™ Display Ergo 4K HDR10 Monitor, Model # 32UN880-B are compatible with other LG monitors that come with other types of stands and neither Ergo Stand is compatible with the LG 34'' Class 21:9 UltraWide® 5K2K Nano IPS LED Monitor with HDR 600 (34'' Diagonal), Model # 34BK95U-W...^Ivan
Answered by: Ivanf
Date published: 2022-01-05

What is the maximum height the bottom of the monitor can be raised off desk level with the Ergo stand?

Asked by: PopsRacer
Monitor 34WN780-B with the stand has a height of 24.1" at its highest and 18.9" at its lowest. ^Daphane
Answered by: LG Electronics
Date published: 2021-12-21

what is maximum thickness of the table that the ergo stand can be mounted on (in cm)? thanks

Asked by: dvdvdv
The C-clamp for the Ergo Stand for the LG 34'' UltraWide Ergo QHD IPS HDR Monitor with FreeSync™, Model # 34WN780-B can only be used on tables less than 90mm (3.5") 90mm is 9 cm...^Ivan
Answered by: Ivanf
Date published: 2021-08-04

Is this monitor HDCP compliant? If so, which version number? I also would like to know which versions of DisplayPort and HDMI this monitor uses. Thanks!

Asked by: GastonK
@Ivanf You say that HDCP compliance is not required, but that is only true in a single-monitor setup or in a multiple-monitor setup where no other monitors are 4K. For example, right now one of my monitors is 4k and is HDCP 2.2 compliant, and one is not. As a result of this streaming services, such as Netflix, will not stream 4K content while the lower-rated monitor is connected to the PC, no matter which monitor Netflix is display on. This is why I asked the question - is the monitor HDCP 2.2 compliant, or not? That is the only thing that matters when I asked the question. I appreciate the attempt to get to the root of my reason for asking the question (I really do), but it was not particularly helpful in this case, unfortunately. Knowing the HDMI port and DisplayPort versions is very helpful, so thank you for answering that. It actually also answers my first question about HDCP, which is why I asked. DisplayPort 1.4 should be HDCP 2.2 compliant, so I believe this monitor will be OK for my application (correct me if I am wrong). My understanding is that in order to be rated as DisplayPort 1.4 it must be HDCP 2.2 compliant (I do not believe the same holds true for HDMI though).
Answered by: GastonK
Date published: 2021-04-29
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