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PENUMBRA K687 PRO (CNC Aluminum Gaming Keyboard)

Redragon PENUMBRA K687 Pro

The Redragon PENUMBRA K687 Pro 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 looking for a quieter, cushioned typing experience with flexible connectivity options. Its layout keeps essential function keys without the need for FN combos, making it practical for productivity and casual gaming.</p... Read more
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PENUMBRA K687 PRO (CNC Aluminum Gaming Keyboard)

Redragon
Redragon
Ships to US
$59
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Compare Redragon PENUMBRA K687 Pro vs Keychron J2 vs Xinmeng M75 Specification

Compare similar keyboards side by side, or use the comparison table to compare all keyboards!
Redragon PENUMBRA K687 ProKeychron J2Xinmeng M75
70
PENUMBRA K687 PRO (CNC Aluminum Gaming Keyboard)
78
Keychron J2 QMK Wireless Mechanical Keyboard
69
XINMENG M75/M75 Pro Gasket RGB Mechanical Keyboard
0.0 (0)
4.5 (8)
0.0 (0)
  • Has Linear switch options
  • Connects via USB-C
  • Features N-key rollover
  • Weighs about 1800 g
  • Sized at 43 x 132 x 43 mm
  • Made with a Aluminum case
  • Released in 2025
  • Has Linear, Tactile, Clicky switch options
  • Provides dedicated media keys
  • Supports QMK firmware
  • Supports VIA configuration
  • Runs at a 1000 Hz polling rate
  • Equipped with a 3750 mAh battery
  • Offers Yes, Rgb, White RGB lighting
  • Includes a Yes, TFT display
  • Equipped with a 5000 mAh battery
  • Sized at 20 x 326 x 152 mm
  • Made with a Copper, Aluminum case
Scores
  • Performance: 79.3
  • Build Quality: 72.9
  • Productivity: 71
  • Customizability: 61.3
  • Portability: 74.9
Scores
  • Performance: 70
  • Build Quality: 71.1
  • Productivity: 73.8
  • Customizability: 86.7
  • Portability: 73.4
Scores
  • Performance: 50.9
  • Build Quality: 74.2
  • Productivity: 65.8
  • Customizability: 67.7
  • Portability: 73.5
Name
Redragon PENUMBRA K687 Pro
Name
Keychron J2
Name
Xinmeng M75
Release year
2024
Release year
2025
Release year
2024
Switch Options
Linear
Switch Options
Linear, Tactile, Clicky
Switch Options
-
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
 
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
-
Battery capacity
-
Battery capacity
3750 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
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
 
Rgb, White
Backlight
 
Rgb
Case Colors
Case Colors
Case Colors
Case Material
Aluminum
Case Material
-
Case Material
Copper, Aluminum
Keycaps Material
PBT
Keycaps Material
PBT
Keycaps Material
PBT
Dimensions
43 x 132 x 43 mm
Dimensions
-
Dimensions
20 x 326 x 152 mm
Weight
1800g
Weight
-
Weight
-
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Product Description

The Redragon PENUMBRA K687 Pro 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 looking for a quieter, cushioned typing experience with flexible connectivity options. Its layout keeps essential function keys without the need for FN combos, making it practical for productivity and casual gaming.

Key Features

  • 81-key layout combines a 65% compact size with dedicated function keys, saving desk space while maintaining key accessibility.
  • One-knob control allows quick adjustment of backlight brightness and media playback without extra keys, streamlining use.
  • Tri-mode connectivity offers wired USB-C, Bluetooth 3.0/5.0, and 2.4GHz wireless options, adapting to different devices and environments.
  • Software support enables custom keybindings, macros, and lighting effects, enhancing workflow and personalization.

Build Quality

  • Full CNC aluminum frame with a frosted finish provides a stable, solid base that resists flex during typing.
  • Precision-locked covers with silicone gaskets replace traditional screws, reducing noise and allowing slight keyboard flex for softer feedback.
  • Multiple layers of foam dampen hollow sounds, resulting in quieter keystrokes and a cleaner acoustic profile.

Typing Experience

  • Custom thick-lubed linear switches deliver smooth, elastic keypresses with reduced scratchiness.
  • Vertical cushioning and silicone pads soften impact noise, making typing quieter and more comfortable over long sessions.
  • Upgraded hot-swap sockets support most 3- and 5-pin switches, allowing switch customization without soldering.

Trade-offs

  • The compact layout omits a dedicated numpad, which may be less ideal for users needing frequent numeric input.
  • While the keyboard supports multiple wireless modes, battery life and latency details are unknown.
  • The one-knob control limits direct access to some media or lighting functions that other keyboards might offer via dedicated keys.

Frequently Asked Questions (FAQ)

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