• UltraWide® 21:9
  • Mac® Compatible
  • LED Backlighting
  • IPS
  • ENERGY STAR® Qualified
29" Class 21:9 UltraWide® IPS LED Monitor (29" Diagonal)


    • Screen Size
    • 29"
    • Panel Type
    • LED


    • Screen Size Class (diagonal)
    • 29" Class (29.0" diagonal)
    • Panel Type
    • IPS
    • Aspect Ratio
    • 21:9
    • Resolution
    • 2560 x 1080
    • Color Gamut (CIE1976)
    • sRGB (100%)
    • Brightness (typical)
    • 250 cd/m2 (Center, 1 point)
    • Contrast Ratio(Original)
    • 1000:1
    • Response Time (typical)
    • 5ms(GTG)
    • Viewing Angle (CR≥10)
    • R/L 178 (Typ.), U/D178 (Typ.)
    • Surface Treatment
    • Hard Coating (3H), anti-glare


    • HDMI™
    • 2
    • Display Port
    • 1


    • ENERGY STAR® Qualified
    • Yes
    • Type
    • Adapter
    • Input
    • 100~240V


    • PC
    • Yes (Wide, Original, Cinema1, Cinema2, 1:1)
    • DDC/CI
    • Yes
    • Auto Resolution
    • Yes
    • PBP (Picture by Picture)
    • Yes
    • Plug & Play
    • Yes
    • sRGB
    • Yes
    • Screen Split (S/W)
    • Yes


    • Monitor without Stand (WxHxD)
    • 27.7" x 12.9" x 2.5"
    • With Stand (WxHxD)
    • 27.7" x 16.3" x 8.4"
    • Shipping Dimensions (WxHxD)
    • 32.1" x 15.9" x 6.2"
    • Without Stand Weight
    • 10.4 lbs
    • With Stand Weight
    • 11.4 lbs
    • Shipping Weight
    • 16.5 lbs


    • TCO6.x
    • TC06.0
    • UL(cUL)
    • Yes
    • CB
    • Yes
    • FCC-B, CE
    • Yes
    • CCC, BSMI
    • Yes
    • KC
    • Yes
    • EPA 6.0
    • Yes
    • Yes
    • Windows
    • Yes


    • VESA® Size (mm)
    • 75 x 75
    • Power Cord
    • 1
    • HDMI
    • 1
    • Detachable Base
    • Yes
    • Stand Body Cover
    • 1
    • Tilt (angle)
    • -5~20 Degree


    • Limited Warranty
    • 1 Year Parts & Labor
    • UPC
    • 719192194915

What people are saying

Rated 5 out of 5 by from Excellent to view spread sheets! I have had this monitor for quite some time and it is an excellent working tool
Date published: 2021-06-10
Rated 5 out of 5 by from full view This is the best monitor I have ever used. Everything fits on the screen making it very easy to read/view.
Date published: 2016-01-08
Rated 4 out of 5 by from Good but could be a bit better I've connected my Macbook and at times a cable box to my monitor. The display is high quality although the software doesn't allow changing the aspect ratio on the side where the cable comes in. Reading stock graphs and charts out of proportion takes a while to get used to. If the software could allow more adjustments when two sources aspect ratios it would be 5 stars across the board.
Date published: 2015-08-01
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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.

how many hertz is on the monitor

Asked by: dean22
The LG 29'' Class 21:9 UltraWide® IPS LED Monitor (29'' Diagonal), Model # 29UM55-P is a 60 Hz Refresh Rate monitor...^IFV
Answered by: Ivanf
Date published: 2019-10-09

I have MacOS Sierra 10.12.6. How can I update the firmware so my OS supports 29UM55-P?

Asked by: Stellaresults
Hello, please see the link provided. ^AC
Answered by: Amber C
Date published: 2018-05-18

When I connect the monitor it isn't full screen.

Asked by: Alex000000000000000
Hello Alex, we will need more information to be able to assist. Please give us a call at 1-800-243-0000 when you are with the unit. ^AC
Answered by: Amber C
Date published: 2018-03-01

Cannot change video output to the monitor  Whenever I try to go through the menu and switch the outputs and I press "ok" it goes black then goes back to main menu, it even says it's connected and it does the same thing when it asks to connect 

Asked by: veggydip
We regret the inconvenience you have experienced with this monitor. This could be caused by some of the devices connected, or by a resolution or refresh rate of a signal. Please contact our Customer Interactive Center at 800-243-0000 for assistance with this matter.
Answered by: NeilE
Date published: 2016-01-08

Adjust graphics display

Graphics are stretched out wider when displayed on this monitor in comparison to my macbook pro giving me a "fatter" presentation than the actual image. How do I resolve this?
Asked by: jenius1120
We regret the inconvenience you have experienced with this monitor. The appearance of images on this screen will depend upon the resolution settings of the video card on your computer. Check these settings to ensure they are compatible. For additional assistance, please contact our Customer Interactive Center at 800-243-0000.
Answered by: NeilE
Date published: 2015-09-12

Is the refresh rate really 75Hz?

I was curious if the listing of 75Hz as the refresh rate is correct, on places like I just bought this monitor and upon setting it up today with a DisplayPort cable (not HDMI), both Windows and Nvidia Control Panel show the maximum refresh rate to be only 60Hz. Is this supposed to be the case? Thanks.
Asked by: VinceTheStampede
We appreciate your interest in this monitor. According to the information listed on page 46 of the owner’s manual, a 75Hz Refresh Rate is available at resolutions of 640x480, 800x600 and 1152x864. The maximum resolution of 2560x1080 is available only at 60Hz. The Refresh Rate is to be a setting of the video card of the computer.
Answered by: NeilE
Date published: 2015-07-29

What is needed get this to work with a computer, I have a standard VGA HD 15 output on the laptop, and a cable to go to HDMI

Asked by: Coachmec
We appreciate your interest in this monitor. If a conversion cable is already in place, between the 15-pin VGA port and the HDMI monitor port, then all that remains is a compatible video resolution. Such resolutions can be found on page 46 of your owner’s manual. These will need to be set on the computer/laptop itself, in order to display the picture properly on the screen.
Answered by: NeilE
Date published: 2015-06-17

How can I get max resolution on this monitor via DVI?

It appears that the max resolution on this monitor is not supported via the HDMI ports. How can I connect from a PC DVI out to this monitor to get full resolution?
Asked by: mgdavey
The maximum resolution of 2560 x 1080 @ 60 Hz is supported via the DVI-D, HDMI and the DisplayPort as shown in the chart on page 46 of your owner's manual for the LG 29" Class 21:9 UltraWide™ IPS LED Monitor (29" Diagonal), Model # 29UM55-P. If you're not getting the full resolution you may need to check your video card or your cables...^IFV
Answered by: LGJoel
Date published: 2018-03-19
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