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NEWMEN GM840Pro Hot Swap Three-mode Mechanical Keyboard

Newmen GM840 Pro

The Newmen GM840 Pro is a compact 75% mechanical keyboard suited for users who want a balance of functionality and portability with versatile connectivity. It fits well for hobbyists who like to customize switches without soldering, and for users needing wireless options alongside wired use. Its artistic keycaps and RGB lighting also appeal to those who value aesthetics in their setup.</p... Read more
Compare prices from $55.00 to $75
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Compare Newmen GM840 Pro vs Xinmeng M75 Pro vs Keychron J2 Specification

Compare similar keyboards side by side, or use the comparison table to compare all keyboards!
Newmen GM840 ProXinmeng M75 ProKeychron J2
NEWMEN GM840Pro Hot Swap Three-mode Mechanical Keyboard
80
[In Stock] Xinmeng M75/M75Pro 75% Pre-Built Mechanical Keyboard
77
Keychron J2 QMK Wireless Mechanical Keyboard
0.0 (0)
0.0 (0)
4.3 (9)
  • Released in 2022
  • Has Linear, Clicky switch options
  • Connects via USB-C
  • Equipped with a 2000 mAh battery
  • Weighs about 747 g
  • Sized at 39 x 121 x 31 mm
  • Released in 2024
  • Has Linear, Silent switch options
  • Comes with a knob
  • Includes a Yes, TFT display
  • Compatible with both Mac and Windows
  • Features N-key rollover
  • Uses a Gasket Mount mounting style
  • Equipped with a 5000 mAh battery
  • Weighs about 900 g
  • Sized at 20 x 326 x 152 mm
  • Released in 2025
  • Has Linear, Tactile, Clicky switch options
  • Provides dedicated media keys
  • Supports QMK firmware
  • Supports VIA configuration
  • Equipped with a 3750 mAh battery
  • Offers Yes, Rgb, White RGB lighting
Scores
  • Performance: 48.6
  • Build Quality: 40.5
  • Productivity: 63.5
  • Customizability: 54.3
  • Portability: 75.9
Scores
  • Performance: 81.6
  • Build Quality: 74.9
  • Productivity: 81.8
  • Customizability: 79.8
  • Portability: 80.1
Scores
  • Performance: 70.3
  • Build Quality: 71.4
  • Productivity: 74
  • Customizability: 86.9
  • Portability: 73.4
Name
Newmen GM840 Pro
Name
Xinmeng M75 Pro
Name
Keychron J2
Release year
2022
Release year
2024
Release year
2025
Switch Options
Linear, Clicky
Switch Options
Linear, Silent
Switch Options
Linear, Tactile, Clicky
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
 
TFT
Display Support
 
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
2000 mAh
Battery capacity
5000 mAh
Battery capacity
3750 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
-
Mount Style
Gasket Mount
Mount Style
-
Screw in Stabilizers
 
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb
Backlight
 
Rgb
Backlight
 
Rgb, White
Case Colors
Case Colors
Case Colors
Case Material
Plastic
Case Material
Plastic
Case Material
-
Keycaps Material
PBT
Keycaps Material
PBT
Keycaps Material
PBT
Dimensions
39 x 121 x 31 mm
Dimensions
20 x 326 x 152 mm
Dimensions
-
Weight
747g
Weight
900g
Weight
-
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Product Description

The Newmen GM840 Pro is a compact 75% mechanical keyboard suited for users who want a balance of functionality and portability with versatile connectivity. It fits well for hobbyists who like to customize switches without soldering, and for users needing wireless options alongside wired use. Its artistic keycaps and RGB lighting also appeal to those who value aesthetics in their setup.

Key Features

  • 75% layout with 84 keys includes function row, arrow keys, and navigation cluster, saving desk space while retaining essential keys.
  • Five-pin hot-swappable switch sockets allow easy switch replacement without soldering, supporting customization and switch experimentation.
  • Triple connection modes: Bluetooth 5.0, 2.4GHz wireless, and wired USB Type-C, enabling flexible use across multiple devices.
  • Customizable RGB lighting with 18 built-in effects lets users tailor lighting to different games or environments.
  • High-density muffling pads reduce typing noise, offering a quieter experience compared to typical mechanical keyboards.
  • Large 2000mAh battery supports extended wireless use, reducing charging frequency.

Typing Experience

The keyboard ships with G-Pro or Box switches, known for tactile and clicky options. The hot-swappable design encourages trying different switch types. Muffling pads help lower sound levels, making it more suitable for shared spaces. Dye-sublimated PBT keycaps provide durability and a textured feel, resisting shine from prolonged use.

Connectivity

Users can switch between wired and two wireless modes depending on their setup. Bluetooth 5.0 supports multiple device connections, useful for switching between computers or mobile devices. The 2.4GHz wireless mode offers a stable connection with low latency, while wired mode ensures zero input delay and charging simultaneously.

Trade-offs

  • The compact 75% layout omits the number pad, which may be inconvenient for users needing frequent numeric input.
  • Unknown firmware or keymapping customization limits advanced remapping or macro programming options.
  • Weight and dimensions suggest moderate portability but not ultra-light travel use.

Frequently Asked Questions (FAQ)

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