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LG 27MR400-B 27" specifications and in-depth review

LG 27MR400-B 27"

Manufacturer: LG

The LG 27MR400-B is a 27-inch standard monitor built around an IPS, LED-backlit LCD panel, offering a 1920x1080 resolution at 81 ppi across its full screen surface. Designed for everyday use rather than competitive gaming, it runs at a 75Hz refresh rate with AMD FreeSync support to reduce screen tearing during general desktop tasks and light multimedia use. Viewing angles reach 178 degrees both horizontally and vertically, and the panel renders 16.7 million colors with a 1300:1 contrast ratio, giving it a reasonably solid foundation for office and home use.

On the connectivity side, the monitor includes one HDMI port, a VGA connector, and a 3.5mm audio jack, while DisplayPort, USB, USB Type-C, and wireless options are all absent. Typical brightness sits at 250 nits with 99% sRGB coverage, and color calibration is not supported. Power consumption is rated at 24W during operation and drops to 0.3W in standby. The stand supports tilt and VESA mounting, though swivel and portrait mode are not available. Physical dimensions are 611.7mm wide, 362.3mm tall, and a notably slim 50.5mm thick, with a total weight of 3,840g.

Pros
  • A 1300:1 contrast ratio provides solid depth between light and dark areas for a standard-use IPS panel
  • 99% sRGB coverage ensures color representation closely aligned with the standard color space, suitable for general content viewing
  • AMD FreeSync support helps reduce screen tearing during everyday use and light gaming
  • The inclusion of both HDMI and VGA inputs covers a wider range of source devices, including older hardware
  • A 3.5mm audio jack allows direct connection of headphones or external speakers without needing additional adapters
  • At just 50.5mm thick, the slim profile keeps the physical footprint compact and unobtrusive on a desk
Cons
  • The 75Hz refresh rate and 5ms response time make this monitor unsuitable for fast-paced or competitive gaming
  • At 81 ppi on a 27-inch panel, the pixel density results in noticeably reduced sharpness for text and fine detail
  • Typical brightness of only 250 nits may be insufficient in well-lit or bright ambient environments
  • No DisplayPort output limits connectivity options for users with modern GPUs or multi-monitor setups
  • The stand offers tilt only, with no swivel or portrait mode rotation available
  • There are no USB ports of any kind, ruling out any peripheral connectivity through the monitor
Who is this for?

The LG 27MR400-B is well-suited for users looking for a straightforward everyday office or home desktop display, where tasks like document editing, web browsing, and general media consumption take priority over high-performance visuals. The combination of 99% sRGB coverage and a 1300:1 contrast ratio makes it a reasonable fit for users who value accurate, consistent color rendering in standard work environments. The inclusion of both HDMI and VGA inputs alongside a 3.5mm audio jack also makes it practical for connecting a wider range of devices, including older machines, which can be useful in shared or legacy-hardware office setups. Those who plan to mount the display on a wall or monitor arm will appreciate the VESA mount compatibility and the slim 50.5mm profile.

Who is this NOT for?

This monitor is not a good fit for gamers or users who require fast display response, as the 75Hz refresh rate and 5ms response time fall short for competitive or fast-paced gaming scenarios, even with AMD FreeSync present. Users working in color-critical or professional creative fields will also find the lack of color calibration support and the modest 250-nit brightness limiting, especially in well-lit workspaces or when accurate color profiling is required. Those who rely on a monitor to serve as a connectivity hub — expecting USB ports, DisplayPort output, or any wireless functionality — will find this unit unsuitable, as none of those options are available.

Display:

Display type IPS, LCD, LED-backlit
response time 5 ms
screen size 27"
resolution 1920 x 1080 px
pixel density 81 ppi
Adaptive synchronization AMD FreeSync
has anti-glare coating ✕
refresh rate 75Hz
maximum horizontal viewing angle 178º
maximum vertical viewing angle 178º
has a matte panel ✕
has a glossy panel ✕
has a touch screen ✕

The display is a 27-inch IPS, LCD, LED-backlit panel running at a 1920x1080 resolution with a pixel density of 81 ppi. It operates at a 75Hz refresh rate with a 5ms response time, and includes AMD FreeSync support for adaptive synchronization. Both horizontal and vertical viewing angles extend to 178 degrees, offering consistent image quality across a wide range of viewing positions. The panel does not feature anti-glare coating and carries no matte or glossy classification; touch screen functionality is also not available.

General info:

Type Standard
EU energy label E
supports total tilt ✓
Has a swivel stand ✕
Supports VESA mount ✓
height 362.3 mm
width 611.7 mm
thickness 50.5 mm
weight 3840 g
supports portrait mode ✕
volume 11191.754955 cm³

This is a standard-type monitor with an EU energy label of E, measuring 611.7mm wide, 362.3mm tall, and a notably slim 50.5mm thick, with a total weight of 3,840g and a volume of approximately 11,192cm³. The stand supports tilt adjustment and the unit is VESA mount compatible, providing flexibility for wall or arm installations. Swivel movement and portrait mode rotation are not supported, keeping ergonomic adjustability limited to tilt only.

Colors:

brightness (typical) 250 nits
supports color calibration ✕
display colors 16.7 million
contrast ratio 1300:1
sRGB coverage 99%

The panel displays 16.7 million colors with a 1300:1 contrast ratio, providing solid depth between light and dark tones for a standard-use display. Typical brightness is rated at 250 nits, and sRGB coverage reaches 99%, closely matching the standard color space and making it suitable for general content viewing. Color calibration is not supported on this model.

Connectivity:

HDMI ports 1
supports Thunderbolt ✕
DisplayPort outputs 0
has a socket for a 3.5 mm audio jack ✓
has a DVI connector ✕
USB ports 0
Has USB Type-C ✕
supports Ethernet ✕
supports Wi-Fi ✕
has AirPlay ✕
mini DisplayPort outputs 0
has a VGA connector ✓

Video input options are limited but cover the most common legacy and modern connections, with one HDMI port and one VGA connector available. A 3.5mm audio jack is also present, allowing direct connection of headphones or external speakers. There are no DisplayPort, mini DisplayPort, DVI, USB, or USB Type-C ports, and the monitor does not support Thunderbolt, Ethernet, Wi-Fi, or AirPlay, keeping its connectivity footprint straightforward and minimal.

Power:

operating power consumption 24W
standby power consumption 0.3W

The monitor draws 24W during normal operation and drops to a very low 0.3W in standby mode, reflecting a modest and energy-conscious power profile for a display of this screen size.

Features:

has PiP ✕
has stereo speakers ✕
has built-in smart TV ✕
has a remote control ✕
supports Dolby Digital ✕
supports Dolby Digital Plus ✕
has DTS Surround ✕
has an ambient light sensor ✕
has a front camera ✕

This monitor includes no supplementary features beyond its core display function. There are no built-in speakers and no support for Dolby Digital, Dolby Digital Plus, or DTS Surround, so any audio output requires external hardware. It also lacks Picture-in-Picture, a remote control, an ambient light sensor, a front camera, and smart TV functionality, confirming a purely display-focused design with no multimedia or smart device capabilities.

Final Verdict

The LG 27MR400-B is a standard 27-inch monitor that settles comfortably into its role as a no-frills everyday display, with 99% sRGB coverage and a 1300:1 contrast ratio providing a dependable visual foundation for office work and general home use. The combination of HDMI and VGA inputs with a 3.5mm audio jack adds a degree of practical versatility, particularly for users with mixed or older device setups. That said, the 75Hz refresh rate, 5ms response time, 250-nit brightness ceiling, and absence of USB connectivity or color calibration mean it was clearly designed with simplicity and basic functionality in mind rather than performance or expandability. For users whose needs align with straightforward daily computing tasks on a generously sized screen, the 27MR400-B delivers a clean and reliable experience — but those expecting more from their display in terms of speed, brightness, or peripheral integration should look elsewhere.

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