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MMD KM40 - 40% Wireless Aluminium Keyboard

MMD KM40

The MMD KM40 is a compact 40% mechanical keyboard suited for users seeking a small footprint with wireless flexibility. It fits well for beginners exploring compact layouts, users wanting a durable aluminum case, and those interested in customizing key functions and switches. Its tri-mode wireless and hot-swappable switches add versatility for mobile or minimalist setups.</p... Read more
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MMD KM40 - 40% Wireless Aluminium Keyboard

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MonacoKeys
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$84
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Compare MMD KM40 vs Other 0xCB Static vs Keychron Q9 Specification

Compare similar keyboards side by side, or use the comparison table to compare all keyboards!
MMD KM40Other 0xCB StaticKeychron Q9
82
MMD KM40 - 40% Wireless Aluminium Keyboard
74
0xCB Static Keyboard Kit
95
Keychron Q9 QMK Custom Mechanical Keyboard
5.0 (4)
0.0 (0)
4.6 (10)
  • Released in 2026
  • Has Linear, Tactile switch options
  • Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity
  • Equipped with a 2000 mAh battery
  • Weighs about 620 g
  • Offers Yes, Rgb RGB lighting
  • Released in 2025
  • Includes a Yes, OLED display
  • Made with a Acrylic, Steel, Metal case
  • Offers No RGB lighting
  • Released in 2022
  • Has Linear, Tactile, Clicky switch options
  • Built with the ANSI, ISO layout standard
  • Offers Split Spacebar ergonomics
  • Compatible with both Mac and Windows
  • Includes screw-in stabilizers
  • Runs at a 1000 Hz polling rate
  • Weighs about 1050 g
  • Sized at 20 x 94 x 326 mm
  • Offers Yes, Rgb, South-face, Rgb South-face RGB lighting
Scores
  • Performance: 61.3
  • Build Quality: 82.7
  • Productivity: 69.5
  • Customizability: 84.3
  • Portability: 84.1
Scores
  • Performance: 47.9
  • Build Quality: 78.3
  • Productivity: 58.4
  • Customizability: 78.1
  • Portability: 62.5
Scores
  • Performance: 65.8
  • Build Quality: 91
  • Productivity: 94.5
  • Customizability: 97.1
  • Portability: 70.4
Name
MMD KM40
Name
Other 0xCB Static
Name
Keychron Q9
Release year
2026
Release year
2025
Release year
2022
Switch Options
Linear, Tactile
Switch Options
-
Switch Options
Linear, Tactile, Clicky
Profile
Normal Profile
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Hot Swappable
 
Layout Size
40%
Layout Size
40%
Layout Size
40%
Layout Standard
ANSI
Layout Standard
ANSI
Layout Standard
ANSI, ISO
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Layout Ergonomics
Split Spacebar
Knob Support
 
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
OLED
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
Wired, Wired only
Connection
Wired, Wired only
Polling Rate
-
Polling Rate
-
Polling Rate
1000 Hz
Battery capacity
2000 mAh
Battery capacity
-
Battery capacity
-
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
Gasket Mount
Mount Style
-
Mount Style
Gasket Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb
Backlight
 
Backlight
 
Rgb, South-face
Case Colors
Case Colors
Case Colors
Case Material
Aluminum
Case Material
Acrylic, Steel, Metal
Case Material
Aluminum
Keycaps Material
PBT
Keycaps Material
-
Keycaps Material
PBT
Dimensions
-
Dimensions
-
Dimensions
20 x 94 x 326 mm
Weight
620g
Weight
-
Weight
1050g
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Product Description

The MMD KM40 is a compact 40% mechanical keyboard suited for users seeking a small footprint with wireless flexibility. It fits well for beginners exploring compact layouts, users wanting a durable aluminum case, and those interested in customizing key functions and switches. Its tri-mode wireless and hot-swappable switches add versatility for mobile or minimalist setups.

Key Features

  • 40% layout with 44 keys saves desk space and supports minimalist workflows.
  • Fully programmable via VIA software, allowing complete key remapping.
  • Hot-swappable switches enable easy switch replacement without soldering.
  • Tri-mode connectivity offers Bluetooth 5.0 (connect up to 3 devices), 2.4 GHz wireless, and USB-C wired options for flexible use.
  • RGB lighting with 22 effects and 16 million colors for visual customization.

Build Quality

  • CNC-machined aluminum case provides stability and a premium feel.
  • Surface finishes vary by color, including anodized and electrophoretic coatings for durability.
  • Gasket mounting reduces typing noise and adds cushioning for a softer keypress.
  • Keycaps are 1.7 mm thick PBT with dye-sub printing, resistant to wear and shine.
  • Internal sound dampening layers help minimize typing noise and vibrations.

Typing Experience

  • Switch options include linear and tactile variants with different actuation forces, suiting various typing preferences.
  • Gasket mount and sound dampening contribute to a quieter, cushioned typing feel.
  • Hot-swappable switches allow users to experiment with different switch types easily.

Connectivity

  • Supports Bluetooth 5.0 for wireless use with up to three devices, facilitating quick device switching.
  • 2.4 GHz wireless mode offers a stable connection with low latency, suitable for gaming or productivity.
  • USB-C wired mode ensures zero latency and charging capability.

Trade-offs

  • 40% layout lacks dedicated function and arrow keys, requiring layer use which may slow some workflows.
  • Battery capacity is moderate; exact runtime is unknown.
  • No onboard memory mentioned, so custom layouts may require software to be active.
  • Limited switch options compared to some enthusiast boards.

Customer reviews

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