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70
Niuniu KB40 - 40% Custom Keyboard Kit

Niuniu KB40

The NIUNIU KB40 Electrocapacitive is a 40% mechanical keyboard kit designed for hobbyists and enthusiasts who want a compact layout with electrocapacitive switch compatibility. It suits users who value a small footprint and the option to customize with both MX-style and electrocapacitive switches. The kit format requires assembly and some familiarity with keyboard building.</p... Read more
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Niuniu KB40 - 40% Custom Keyboard Kit

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MonacoKeys
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$170

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Compare Niuniu KB40 vs Keychron Q15 Max Ortholinear vs Epomaker Hack70 Specification

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Niuniu KB40Keychron Q15 Max OrtholinearEpomaker Hack70
70
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EPOMAKER HACK70
0.0 (0)
0.0 (0)
5.0 (1)
  • Available in a 40% layout
  • Offers No RGB lighting
  • Released in 2024
  • Has Tactile, Linear switch options
  • Comes with a knob
  • Provides dedicated media keys
  • Supports QMK firmware
  • Includes screw-in stabilizers
  • Uses a Plate Mount mounting style
  • Equipped with a 4000 mAh battery
  • Has Linear switch options
  • Supports VIA configuration
  • Equipped with a 3000 mAh battery
  • Weighs about 676 g
  • Sized at 40 x 302 x 119 mm
  • Made with a ABS, Plastic case
  • Features PBT keycaps
Scores
  • Performance: 45.1
  • Build Quality: 73
  • Productivity: 77.3
  • Customizability: 62.8
  • Portability: 87.6
Scores
  • Performance: 74.9
  • Build Quality: 78.9
  • Productivity: 94.3
  • Customizability: 85.6
  • Portability: 88.9
Scores
  • Performance: 72.4
  • Build Quality: 71.3
  • Productivity: 83.7
  • Customizability: 73.9
  • Portability: 88.3
Name
Niuniu KB40
Name
Keychron Q15 Max Ortholinear
Name
Epomaker Hack70
Release year
2026
Release year
2024
Release year
2026
Switch Options
-
Switch Options
Tactile, Linear
Switch Options
Linear
Profile
Normal Profile
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Hot Swappable
 
Layout Size
40%
Layout Size
65%
Layout Size
65%
Layout Standard
ANSI
Layout Standard
ANSI
Layout Standard
ANSI
Layout Ergonomics
Ortholinear
Layout Ergonomics
Ortholinear
Layout Ergonomics
Ortholinear
Knob Support
 
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
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
-
Battery capacity
4000 mAh
Battery capacity
3000 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
Gasket Mount
Mount Style
Plate Mount
Mount Style
Gasket Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Backlight
 
Rgb, South-face
Backlight
 
Rgb, South-face
Case Colors
Case Colors
Case Colors
Case Material
Aluminum
Case Material
Aluminum
Case Material
ABS, Plastic
Keycaps Material
-
Keycaps Material
-
Keycaps Material
PBT
Dimensions
-
Dimensions
-
Dimensions
40 x 302 x 119 mm
Weight
-
Weight
-
Weight
676g
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Product Description

The NIUNIU KB40 Electrocapacitive is a 40% mechanical keyboard kit designed for hobbyists and enthusiasts who want a compact layout with electrocapacitive switch compatibility. It suits users who value a small footprint and the option to customize with both MX-style and electrocapacitive switches. The kit format requires assembly and some familiarity with keyboard building.

Key Features

  • Supports both MX-style and electrocapacitive switches, allowing users to choose between different typing feels and durability.
  • Hotswappable PCB options simplify switch replacement without soldering.
  • Multiple layout options including staggered and ortholinear, catering to various typing preferences.
  • Wireless models support 2.4GHz connection but require a separate dongle for wireless use.

Build Quality

  • Aluminum top and bottom frame provide a solid, stable base for typing.
  • Includes gasket tadpoles and O-rings, which help reduce typing noise and soften keypress impact.
  • Rubber feet improve desk grip and stability during use.
  • PCB and plate materials vary by model, with FR4 for wired and aluminum for wireless versions.

Connectivity

  • Available in wired and wireless versions, offering flexibility depending on user setup.
  • Wireless models require purchasing a separate 2.4GHz dongle to enable connection.
  • Battery included only with wireless models.

Trade-offs

  • As a kit, assembly is required, which may not suit users seeking a ready-to-use keyboard.
  • No foam or sound dampening materials included, so users wanting quieter typing must source these separately.
  • Wireless dongle sold separately, adding complexity for users wanting wireless functionality.
  • Unknown details on firmware and software customization options.

Frequently Asked Questions (FAQ)

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