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PENUMBRA K687 (CNC Aluminum Gaming Keyboard)

Redragon PENUMBRA K687 Mechanical Keyboard

The Redragon PENUMBRA K687 is a compact mechanical keyboard designed for users who want a balance between desk space efficiency and functional key access. It suits typists and gamers seeking a quieter, cushioned typing experience with dedicated function keys without relying on complex key combinations. Its design targets those who prefer a solid build and noise reduction in a smaller footprint.</p... Read more
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PENUMBRA K687 (CNC Aluminum Gaming Keyboard)

Redragon
Redragon
Ships to US
$69
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Compare Redragon PENUMBRA K687 vs Redragon PENUMBRA K687 Pro vs Akko 5075B Plus Specification

Compare similar keyboards side by side, or use the comparison table to compare all keyboards!
Redragon PENUMBRA K687Redragon PENUMBRA K687 ProAkko 5075B Plus
70
PENUMBRA K687 (CNC Aluminum Gaming Keyboard)
70
PENUMBRA K687 PRO (CNC Aluminum Gaming Keyboard)
86
Akko 5075B Plus 75% Hotswap Wireless RGB Keyboard
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  • Released in 2025
  • Supports Wired, Wired only connectivity
  • Sized at 43 x 133 x 43 mm
  • Released in 2024
  • Weighs about 1800 g
  • Sized at 43 x 132 x 43 mm
  • Released in 2023
  • Has Clicky, Linear switch options
  • Built with the ANSI, ISO-DE, ISO-UK, ISO-Nordic, ISO, ISO-NO layout standard
  • Compatible with both Mac and Windows
  • Supports VIA configuration
  • Includes screw-in stabilizers
  • Runs at a 1000 Hz polling rate
  • Equipped with a 4500 mAh battery
  • Sized at 42 x 146 x 335 mm
  • Made with a ABS, Plastic, Silicone case
  • Offers Yes, Rgb, South-face, Rgb South-face RGB lighting
Scores
  • Performance: 79.6
  • Build Quality: 72.9
  • Productivity: 71.3
  • Customizability: 62
  • Portability: 60.2
Scores
  • Performance: 79.5
  • Build Quality: 72.9
  • Productivity: 71.2
  • Customizability: 61.9
  • Portability: 74.8
Scores
  • Performance: 81
  • Build Quality: 78
  • Productivity: 94.4
  • Customizability: 82.2
  • Portability: 79.4
Name
Redragon PENUMBRA K687
Name
Redragon PENUMBRA K687 Pro
Name
Akko 5075B Plus
Release year
2025
Release year
2024
Release year
2023
Switch Options
Linear
Switch Options
Linear
Switch Options
Clicky, Linear
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, ISO-DE, ISO-UK, ISO-Nordic, ISO, ISO-NO
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Layout Ergonomics
Normal
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
Wired, Wired only
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
-
Polling Rate
-
Polling Rate
1000 Hz
Battery capacity
-
Battery capacity
-
Battery capacity
4500 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
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
Backlight
 
Rgb, South-face
Case Colors
Case Colors
Case Colors
Case Material
Aluminum
Case Material
Aluminum
Case Material
ABS, Plastic, Silicone
Keycaps Material
-
Keycaps Material
PBT
Keycaps Material
PBT
Dimensions
43 x 133 x 43 mm
Dimensions
43 x 132 x 43 mm
Dimensions
42 x 146 x 335 mm
Weight
1500g
Weight
1800g
Weight
1500g
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Product Description

The Redragon PENUMBRA K687 is a compact mechanical keyboard designed for users who want a balance between desk space efficiency and functional key access. It suits typists and gamers seeking a quieter, cushioned typing experience with dedicated function keys without relying on complex key combinations. Its design targets those who prefer a solid build and noise reduction in a smaller footprint.

Key Features

  • 81-key layout keeps the compact size of a 65% keyboard while adding a dedicated top row for function keys, removing the need for FN combos and improving convenience.
  • One-knob control allows quick adjustment of backlight brightness and media functions, reducing the need for extra keys or shortcuts.
  • Software support enables customization of lighting modes, macros, and key remapping to tailor the keyboard for work or gaming.

Build Quality

  • Constructed with a CNC aluminum frame, providing a sturdy and stable base that resists flex during use.
  • Gasket-mounted design uses precision-locked covers with silicone gaskets, which add flexibility and reduce rigid noise for a softer typing feel.
  • Multiple layers of foam and silicone pads reduce hollow sounds and vibrations, contributing to quieter keystrokes.

Typing Experience

  • Equipped with custom thick-lubed linear switches offering smooth, cushioned key travel with a creamy feel, suited for users who prefer quiet, consistent keystrokes.
  • Noise dampening materials significantly reduce typing noise, making it suitable for shared or quiet environments.

Trade-offs

  • Compact layout omits a numpad, which may be less ideal for users who frequently input numbers.
  • Wired connectivity only, limiting flexibility for users who prefer wireless setups.
  • Custom switches may not be hot-swappable, restricting switch replacement or upgrades.

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