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LANGTU LT84 Display Screen Mechanical Keyboard

LANGTU LT84

The LANGTU LT84 is a compact 75% mechanical keyboard designed for users who want versatile connectivity and easy customization. It suits hobbyists who value hot-swappable switches and a unique control interface, as well as users who prefer a smaller layout with multimedia controls integrated into a multifunction knob. Its wireless and wired options make it adaptable for different setups, while the RGB lighting and display screen add visual customization.</p... Read more
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LANGTU LT84 Display Screen Mechanical Keyboard

LANGTU LT84 - WhiteGrey / air-sea switch
Mechkeys
Ships to US
$89
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Compare LANGTU LT84 vs Coolkiller CK75 SE vs Epomaker RT75 Specification

Compare similar keyboards side by side, or use the comparison table to compare all keyboards!
LANGTU LT84Coolkiller CK75 SEEpomaker RT75
LANGTU LT84 Display Screen Mechanical Keyboard
75
XVX x CoolKiller CK75 SE Wireless Mechanical Keyboard
-15% off
75
EPOMAKER RT75
0.0 (0)
0.0 (0)
5.0 (5)
  • Released in 2023
  • Comes with a knob
  • Includes a Yes display
  • Enables rapid trigger functionality
  • Uses a Sandwich Mount mounting style
  • Sized at 29 x 138 x 362 mm
  • Offers Yes, Rgb RGB lighting
  • Includes a Yes, LED display
  • Equipped with a 4000 mAh battery
  • Weighs about 1000 g
  • Sized at 40 x 326 x 139 mm
  • Made with a Plastic case
  • Features PBT, PC keycaps
  • Has Linear, Tactile, Silent switch options
  • Includes a Yes, TFT display
  • Equipped with a 5000 mAh battery
  • Weighs about 1165 g
  • Sized at 45 x 352 x 142 mm
  • Made with a ABS case
Scores
  • Performance: 74.2
  • Build Quality: 49.6
  • Productivity: 83.1
  • Customizability: 73.3
  • Portability: 77
Scores
  • Performance: 74.7
  • Build Quality: 66
  • Productivity: 76.5
  • Customizability: 67.3
  • Portability: 80.1
Scores
  • Performance: 60.5
  • Build Quality: 65.5
  • Productivity: 75.8
  • Customizability: 66.3
  • Portability: 79.5
Name
LANGTU LT84
Name
Coolkiller CK75 SE
Name
Epomaker RT75
Release year
2023
Release year
2026
Release year
2026
Switch Options
-
Switch Options
-
Switch Options
Linear, Tactile, Silent
Profile
Normal Profile
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Hot Swappable
 
Layout Size
75%
Layout Size
75%
Layout Size
75%
Layout Standard
ANSI
Layout Standard
ANSI
Layout Standard
ANSI
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
LED
Display Support
 
TFT
Mac/Win Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
USB passthrough
 
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
-
Polling Rate
1000 Hz
Polling Rate
1000 Hz
Battery capacity
-
Battery capacity
4000 mAh
Battery capacity
5000 mAh
Hall Effect Support
 
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
Sandwich Mount
Mount Style
Gasket Mount
Mount Style
Gasket Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb
Backlight
 
Rgb, South-face
Backlight
 
Rgb, South-face
Case Colors
Case Colors
Case Colors
Case Material
-
Case Material
Plastic
Case Material
ABS
Keycaps Material
PBT
Keycaps Material
PBT, PC
Keycaps Material
PBT
Dimensions
29 x 138 x 362 mm
Dimensions
40 x 326 x 139 mm
Dimensions
45 x 352 x 142 mm
Weight
-
Weight
1000g
Weight
1165g
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Product Description

The LANGTU LT84 is a compact 75% mechanical keyboard designed for users who want versatile connectivity and easy customization. It suits hobbyists who value hot-swappable switches and a unique control interface, as well as users who prefer a smaller layout with multimedia controls integrated into a multifunction knob. Its wireless and wired options make it adaptable for different setups, while the RGB lighting and display screen add visual customization.

Key Features

  • Unique color display screen shows active settings and supports custom GIF uploads for personalization.
  • Multifunction metallic knob controls volume, brightness, connection modes, and system switching, reducing reliance on key combos.
  • Full-key hot-swappable sockets allow easy switch replacement without soldering, supporting most aftermarket switches.
  • Dynamic RGB lighting with 19 effects and side RGB strips enhances visual feedback and ambiance.
  • Three-mode connectivity offers Bluetooth, 2.4GHz wireless, and wired USB-C options for flexible device pairing.

Typing Experience and Build

  • Equipped with factory-lubed Sea-Air V3 linear switches, providing smooth keypresses with fast response.
  • Triple-layer sound-shock absorbing design reduces typing noise and vibration through EVA cotton, rubber, and silicone padding.
  • Sandwich structure and finely-tuned stabilizers improve typing comfort and key stability.

Compatibility

  • Supports Windows and Mac operating systems with dual-system switching via the knob.
  • 84-key 75% layout balances compactness with access to essential keys, suitable for users needing a smaller footprint without losing key functionality.

Trade-offs

  • The multifunction knob and display add complexity that may not appeal to users preferring minimalistic designs.
  • Unknown battery life duration despite claims of extra-long usage.
  • Switches are linear only, which may not suit users who prefer tactile or clicky feedback.

Frequently Asked Questions (FAQ)

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