22'' Class Full HD TN Monitor with AMD FreeSync (21.5'' Diagonal)
  • 22" FHD (1920x1080) TN Display
  • AMD FreeSync™ Technology
  • Dynamic Action Sync
  • Black Stabilizer
  • On Screen Control
  • Smart Energy Saving
22" Class Full HD TN Monitor with AMD FreeSync (21.5" Diagonal)
$ 89.99
Where to Buy
*FreeSync is available when it is connected to Display Port or HDMI

On-Screen Control

On-Screen Control puts a host of essential monitor settings into a handy window for quick, easy access. Volume, brightness, picture mode presets, Screen Split 2.0 and Dual Controller and more can now be adjusted with just a few clicks of the mouse, instead of hard buttons on the monitor.
On-Screen Control1 On-Screen Control2
Watch how the On-Screen Control feature can help configure your display for maximum organization and efficiency.
*Software download required to enable OnScreen Control. For download details, visit LGUSA.com/OnScreenControlSupport
*Mounting hardware not included.


  • DC Off
    Less than 0.3W
  • Input
    100-240Vac, 50/60Hz
    Power Save/Sleep Mode (Max.)
    Less than 0.3W
  • Power Consumption (Typ.)
    Power Consumption (Max.)


  • Shipping Weight
    7.7 lbs
    With Stand (WxHxD)
    20.1" x 14.2" x 7.2"
  • Without Stand (WxHxD)
    20.1" x 12" x 1.5"
    Shipping Dimensions (WxHxD)
    25.2" x 14.4" x 4.9"
  • With Stand Weight
    5.3 lbs
    Without Stand Weight
    4.6 lbs


  • Smart Energy Saving
    Reader Mode
  • Flicker Safe
    Black Stabilizer
  • On Screen Control
    Color weakness
  • Crosshair
    Adaptive Sync
    Radeon FreeSync™


  • Limited Warranty
    1 Year Parts and Labor


  • Screen Size Class (diagonal)
    22" Flat
    Color Depth
  • Pixel Pitch (mm)
    0.2480 x 0.2480 mm


  • Refresh Rate
    1920 x 1080
  • Panel Type
    Aspect Ratio
  • Brightness
    150 cd/m² (Min.), 200 cd/m² (Typ.)
    Color Gamut
    NTSC 72% (CIE1931)
  • Response Time
    1ms (GtG at Faster)
    Contrast Ratio (DFC)
    450:1 (Min), 1000:1 (Typ.)
  • Viewing Angle
    90º (R/L), 65º (U/D)
    Surface Treatment
    Anti glare, 3H
  • Dynamic Action Sync


  • Headphone Out
    Yes x 1
  • HDMI
    Yes x 1


  • Speaker
    No built-in speaker


  • Wall Mount Size (mm)
    75 x 75 mm
What people are saying
Rated 4 out of 5 by from Great value. Was looking to buy a used monitor but when I saw the price on this I figured I'd take a chance on buying it. Performs well. Easy to install though the HDMI cable that came with the unit was defective. Only complaint is the on/off switch is used to a number of things that would best be on a menu. Despite that the monitor is a great value and I would buy it again.
Date published: 2019-07-05
Rated 4 out of 5 by from Good monitor for the price Good monitor for the price at $102 But it dosnt have have USB port nor built in speaker
Date published: 2019-05-16
Rated 4 out of 5 by from Quality screen output Good clarity of images, simple to setup and great price
Date published: 2019-05-15
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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.

Does the LG 24MK400H-B 24" Class Full HD Monitor have built-in speaker?

Asked by: Rehne
Hello, the 24MK400H-B does not have built-in speakers. ^AC
Answered by: Amber C
Date published: 2018-12-12

Which LG monitors are compatible with a Mac (Mac Mini) computer?

Asked by: ABQGreg
Most, if not all of our monitors are Plug and Play monitors so they all will work with a Mac Mini. It's just a matter of connectivity and depending on what connections you have on your mac mini, you may or may not need adapters to make the necessary connections depending on what connectivity the monitor has...^IFV
Answered by: LGJoel
Date published: 2018-12-10

Can this monitor be use as a computer monitor and cable TV?

Asked by: Dking174
The main difference between a monitor and a TV is that monitors do not have built-in tuners like TVs do and only a few monitors have built-in speakers. To use the LG 27" Class Full HD TN Monitor with AMD FreeSync (27" Diagonal), Model # 27MK400H to watch cable programming, your cable's Set-Top box will need to have an HDMI Out which you can connect to the HDMI In on the monitor and you will need to connect a pair of active or passive computer speakers to the monitor for sound since it doesn't have built-in speakers...^IFV
Answered by: LGJoel
Date published: 2018-10-17

I have two camera systems, so can i input both a HDMI and dsub at the same time to this monitor? Can i split screen the two systems on the one monitor display at the same time?

Asked by: justin113
The HDMI port on the LG 27" Class Full HD TN Monitor with AMD FreeSync (27" Diagonal), Model # 27MK400H is a digital port while the D-Sub port on it is an analog port so the two ports are independent on one another. You cannot view two inputs simultaneously on this monitor, it does not support Picture-by-Picture. You can download the OnScreen software which has Screen Split 2.0 that enables you to resize and display multiple windows at once, with 14 options including four different picture-in-picture (PIP) choices...^IFV
Answered by: LGJoel
Date published: 2018-06-19
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