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25” Class 21:9 UltraWide™ IPS Monitor (25.0" Diagonal)

  • 25UM64-S

Key Features

  • UltraWide 21:9
  • Mac® Compatible
  • sRGB 99%
  • 4-Screen Split
  • ENERGY STAR® Qualified
UltraWide 21:9

UltraWide 21:9

The UltraWide 21:9 aspect ratio makes movies and games more immersive than ever. Need to get some work done, too? All of that UltraWide real estate makes it easy to view multiple documents at the same time, so you don't need to flip back and forth between them.

Mac® Compatible

Mac® Compatible

Graphic designers will surely appreciate the many features of LG's Mac®-compatible UltraWide monitor. The 21:9 widescreen and 4-Screen Split will simplify working with multiple graphics windows. Disclaimer: Mac is a trademark of Apple Inc., registered in the U.S. and other countries.

sRGB 99%

sRGB 99%

sRGB is the standard color space of ideal color reproduction. So, with over 99% coverage of the sRGB spectrum, this LG monitor is a great solution for professional photographers, graphic designers or anyone looking for highly accurate color.

*Disclaimer: Color mode conversion between Adobe RGB and sRGB is available on the "Color Mode" menu.

4-Screen Split

4-Screen Split

Multitasking doesn't have to mean shuffling back and forth between windows. With a single click, the 4-Screen Split feature divides the screen into as many as four customizable segments, two-by-two. Now you can see four different windows at the same time.

Disclaimer: *Screen Split software runs on Windows Vista/7/8 and Mac OS.

Dual Linkup

Dual Linkup

The Dual Linkup feature allows two compatible portable devices--such as a computer, camera, phone, or Blu-ray player--to be connected to the monitor, and both can be viewed on the same screen simultaneously.



IPS (In-Plane Switching) technology enhances the performance of liquid crystal displays. Response times are shortened, color reproduction is improved, and users can now view the screen at virtually any angle.

Full HD 1080p Resolution

Full HD 1080p Resolution

This stunning picture is the reason you wanted HDTV in the first place. With almost double the pixel resolution, Full HD 1080p gives it superior picture quality over standard HDTV. You’ll see details and colors like never before.

ENERGY STAR® Qualified

ENERGY STAR® Qualified

Earning the ENERGY STAR® rating means that a product meets strict energy efficiency guidelines set by the US Environmental Protection Agency and the Department of Energy. For monitors, it means they save energy both in standby and active (powered on) modes. ENERGY STAR-qualified monitors use about 25% less energy than standard units.

5M:1 Dynamic Contrast Ratio

5M:1 Dynamic Contrast Ratio

A dynamic contrast ratio of 5,000,000:1 is your assurance of strong video performance, with deep blacks, bright whites and pleasing colors.

Screen Size 25"
Screen Size Class (diagonal) 25" Class (25" diagonal)
Panel Type IPS - LED
Aspect Ratio 21:9
Resolution 2560 x 1080
Color Gamut sRGB (100%)
Brightness (cd/m2) 250 cd/m2 (Center, 1 point)
Contrast Ratio(Original) 1000:1
Response Time 14ms (5ms GTG)
Viewing Angle (CR≥10) R/L 178 (Typ.), U/D178 (Typ.)
Panel Surface Hard Coating, 3H
Headphone Out 1
Display Port 1
Type 2ch (L/R)
Audio Output 3W x 2
ENERGY STAR® Qualified Yes
Type Adapter
Input 100~240V
Consumption (On) 31W
PC Yes (Wide, Original, Cinema1, Cinema2, 1:1)
Auto Resolution Yes
Plug & Play Yes
sRGB Yes
Sound Yes
Screen-split Yes (S/W)
PBP (Picture by Picture) Yes
Monitor with Stand (WxHxD) 24.0" x 15.0" x 7.4"
Monitor without Stand (WxHxD) 24.0" x 11.0" x 1.56"
Shipping Dimensions (WxHxD) 26.9" x 14.0" x 5.2"
Monitor with Stand Weight 8.82 lbs
Monitor without Stand Weight 8.3 lbs
Shipping Weight 13.9 lbs
TCO6.x TC06.0
UL(cUL) Yes
CB Yes
KC Yes
Windows 8 Yes
VESA® Size (mm) 75 x 75
Power Cord 1
Detachable Base Yes
Tilt (angle) -5~20 Degree
Stand Body Cover 1
Limited Warranty 1 Year Parts & Labor
UPC 719192194526

What People Are Saying

Rated 4 out of 5 by from Clarity is great The clarity of the monitor is excellent. The product is high quality and easy to use.
Date published: 2015-08-19
Rated 5 out of 5 by from Very good value Found the option to work with side by side of great use. Movies are great
Date published: 2015-02-21
Rated 5 out of 5 by from Love the UltraWide My vision is not what it used to be and I really needed a larger monitor. The ultrawide was exactly what I needed. The picture quality is what you would expect from lg (great) and it is large enough to where I can see what I couldn't before. Really looks great when watching movies. Also, the ability to see 4 screens at once is something you have to see to appreciate. I highly recommend this monitor.
Date published: 2015-02-12
Rated 4 out of 5 by from Fantastic Monitor I do a lot of video editing and Blu-ray watching, and this monitor is excellent. Max resolution of 2560x1080, and although I only utilize 1920x1080, Blu-rays look amazing on this monitor. Scope features fill up the entire screen, and watching Blu-rays in full 2.35:1 in Cinema 1 mode on this monitor is breathtaking. This is a very strong purchase for the high-end moviephile; I've only had this for a few days so far, but I love it. Price point might be a little high but frankly, it's worth every penny. My only minor complaint is that this doesn't have a remote to make switching aspect ratios and adjusting volume a little bit easier. The toggle controls at the bottom of the screen seem a bit cheap and breakable.
Date published: 2014-09-22
Rated 5 out of 5 by from Amazing and so easy to use with my Mac This display is amazing for the price! It took less than 2 min to set up. It connected with my mac very easily all I needed was a thunderbolt adapter which you can pick up at any electronic store. Amazing color and contrast. The extra width has helped with countless programing assignments. The only negative is that I wish the speakers were a little better but I can also have additional plug in speakers so not a big deal
Date published: 2014-08-17
Rated 4 out of 5 by from 21:9 IPS panel for reasonable price This monitor can replace dual monitors with the advantage there are no bezels in the middle- which lets me "squeeze" a third window onto the screen. Got to keep the second monitor - for when I need it. IPS panel has nice color rendering. Great for applications that use multiple windows, for music, photo or video editing. 21:9 is native to film, so movies, "fit" well. One caution - a DVI-D dual link cable is required - I had a DVI-I - no good (the different DVI-cables / adaptors to HDMI look similar but aren't.) Without it the monitor didn't sync.
Date published: 2014-08-10
  • 2015-12-01T07:14CST
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We're here to support you with our product.

View 25UM64-S Product Support

Contact us for any purchasing inquiries.


Ask your questions. Share your answers.
Please first 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 remote (IR) with this monitor?

Does this monitor have IR remote capabilites? Or option to plug in IR Receiver? for volume control and quick Input change.
Asked by: MarshMellow
Hi MarshMellow. The LG 25” Class 21:9 UltraWide™ IPS Monitor (25.0" Diagonal), Model # 25UM64-S does not have an infrared eye on it that enables control with a remote nor does it have that option to plug one in. It does have a joystick on it that allows for quick access to the main menu where you can adjust the monitor volume, enter the PBP menu to display the screens of two input modes on one monitor, configure screen settings, or adjust the color for comfortable text file reading...^IFV
Answered by: LGJoel
Date published: 2015-06-11

Volume is not working

I am using a Surface Pro 3 which is utilizing Windows 8.1. This is connected to the LG monitor by an HDMI chord connected to a Mini port usb. Not sure why there is no volume.
Asked by: greenmachine
Hello greenmachine. Thank you for your inquiry with regards to not being able to get any volume from your tablet when connected to the LG 25” Class 21:9 UltraWide™ IPS Monitor (25.0" Diagonal), Model # 25UM6-S monitor. The pin assignments on the Mini Port USB are (1) VCC (2) RX (3) TX (4) NC (5) GND. As you can see from these pin assignments, you do not have a pin that is designed to carry an Audio signal...^IFV
Answered by: LGJoel
Date published: 2015-08-15

Can 2 computers side by side share this monitor?

I have user A who sits at the desk. He needs user B to be able to turn on and use her computer while he uses his, in a shared space on the monitor. Both users operating separate computers at the same time.
Asked by: JohnnMiami
Sure. Using the pbp mode, if they are able to plug in 2 of the 4 available inputs at the same time. There is a DVI-D, a Display Port and 2 HDMI slots. I currently use my HDMI slots for my console and my pc. You will only be able to use sound from one or the other, not both. But external speakers or headphones can solve that if that is an issue.
Answered by: thegamerdug
Date published: 2015-04-13

Can you play a game console on one half and computer on the other half?

Meaning, can I plug my XBOX ONE console to it and my computer and have both up on the screen?
Asked by: DazR
I frequently use my ps3 and my pc at the same time. I have them both using the HDMI slots, the ps3 loads as if on a 4:3 monitor, but looks just fine. I set my pc resolution to 1280x1024. Everything looks just fine at that res, and it is the best ratio I have tested so far.
Answered by: thegamerdug
Date published: 2015-04-13

I have an LG wide monitor for my computer. When I turn it on, it has DVI on the upper right hand side of my monitor. Should it? What does DVI mean?

The monitor turns on at the lower right hand side of the monitor. When it was new, I probably touched one of the nearby stuff & caused this problem. I have asked many people about it, but they don't know your products & couldn't help me. Please help me!!
Asked by: KansasLGUser
We appreciate your interest in this monitor. The DVI notation simply states that the DVI, or Digital Video Interface, is the active Input Jack being used. This is normal operation.
Answered by: NeilE
Date published: 2015-03-11

Size of power connection

I need a longer power cable for my monitor. Can you tell me the size of the DC coaxial connector?
Asked by: theknack
I apologize, but no; we have no recommendations for accessories other than those originally provided with the monitor.
Answered by: NeilE
Date published: 2015-02-25

what do i need to make my Mac work with LG 25UM64-S

Asked by: chilered
Mac users can also enjoy simple connectivity and advanced convenience in the use of this monitor without additional downloads or installations. The discs provided should allow for any required software. Be certain that the video card of the computer is set at a compatible rate.
Answered by: NeilE
Date published: 2015-02-11

Brightness and contrast

I am trying to adjust the brightness and contrast but I cannot find any buttons to adjust them on the monitor. The directions do not show them either.
Asked by: monitor
To view the On Screen Display (OSD) Menu, press the joystick button at the bottom of the monitor and then enter the MENU. Configure the options by moving the joystick up/down/left/right. Select the EASY CONTROL option. The first 2 functions of this menu are BRIGHTNESS and CONTRAST. This information can be found on pages 27-28 of your owner’s manual.
Answered by: NeilE
Date published: 2014-12-18
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