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Compare Redragon PENUMBRA K687 HE vs UCAL K673 Differences Side by Side

This comparison is for buyers deciding between two 75% Redragon keyboards with distinct priorities. The Penumbra K687 HE is a wired-only board focused on high-performance gaming with Hall Effect magnetic switches and an aluminum case. The UCAL K673 offers tri-mode wireless connectivity in a plastic case at a more affordable price. The decision hinges on whether you value cutting-edge gaming features or wireless convenience.

70
PENUMBRA K687 HE Rapid Trigger Gaming Keyboard
UCAL K673 DE

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  • Has Magnetic switch options
  • Compatible with both Mac and Windows
  • Utilizes Hall effect sensors
  • Enables rapid trigger functionality
  • Supports Wired, Wired only connectivity
  • Weighs about 1500 g
  • Sized at 43 x 334 x 140 mm
  • Made with a Aluminum case
  • Features PBT keycaps
  • Provides dedicated media keys
  • Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity
  • Runs at a 1000 Hz polling rate
  • Equipped with a 4000 mAh battery
  • Weighs about 1240 g
  • Sized at 104 x 335 mm
  • Made with a Plastic case
Scores
  • Performance: 86.7
  • Build Quality: 69.8
  • Productivity: 78.2
  • Customizability: 55.7
  • Portability: 60.7
Scores
  • Performance: 62.1
  • Build Quality: 58.1
  • Productivity: 63.3
  • Customizability: 54.1
  • Portability: 73.5
Name
Redragon PENUMBRA K687 HE
Name
Redragon UCAL K673
Release year
2025
Release year
2025
Switch Options
Magnetic
Switch Options
-
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
75%
Layout Size
75%
Layout Standard
ANSI
Layout Standard
ANSI
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
Connection
Wired, Wired only
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
-
Polling Rate
1000 Hz
Battery capacity
-
Battery capacity
4000 mAh
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
Gasket Mount
Mount Style
Gasket Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb
Backlight
 
Rgb
Case Colors
Case Colors
Case Material
Aluminum
Case Material
Plastic
Keycaps Material
PBT
Keycaps Material
-
Dimensions
43 x 334 x 140 mm
Dimensions
104 x 335 mm
Weight
1500g
Weight
1240g
*Something incorrect or missing? Please
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Pros and Trade-offs

Your primary need dictates the choice. Gamers who want the fastest, most customizable keypresses should invest in the Penumbra K687 HE for its Hall Effect switches and aluminum build. If you need to connect to multiple devices wirelessly or prioritize a lighter, more affordable keyboard, the UCAL K673 is the practical option. Both deliver a compact 75% layout with sound-dampening and a control knob.

Redragon PENUMBRA K687 HE

  • +Dedicated Hall Effect magnetic switches with 0.1-3.4mm adjustable actuation.
  • +CNC aluminum frame with a frosted finish for a premium, solid feel.
  • +Includes Rapid Trigger technology for gaming, adjustable via software.
  • +Five-layer noise dampening system with PO foam, IXPE foam, PET pad, and silicone.
  • +Comes with PBT keycaps, four spare switches, and a switch puller.
  • −Wired-only connectivity limits placement and cable management.
  • −Heavier at 1500g, which reduces portability.
  • −Hall Effect switches are noted by Redragon as exclusive and not cross-compatible with other brands.

Redragon UCAL K673

  • +Tri-mode connectivity with Bluetooth, 2.4GHz wireless, and USB-C wired options.
  • +Lighter weight of 1240g and includes height-adjustable feet.
  • +Large 4000mAh battery for extended wireless use.
  • +More affordable price point compared to the Penumbra model.
  • −Plastic case construction, which may feel less premium than aluminum.
  • −Uses standard linear red switches without the advanced customization of Hall Effect.
  • −Vendor description specifies a QWERTZ (German) layout, which may not be ideal for all users.

Which Keyboard Is Better for Your Needs?

The Penumbra K687 HE is the clear choice for dedicated gaming due to its Hall Effect switches and Rapid Trigger. The UCAL K673 wins for office and travel use, thanks to its wireless connectivity and lighter build. For programming and content creation, both keyboards are closely matched on core layout and features, making the choice more about material preference and budget.

GamingRedragon PENUMBRA K687 HE
  • •Features dedicated Hall Effect magnetic switches for adjustable actuation.
  • •Includes Rapid Trigger technology for faster keypress registration.
  • •Built with a heavier, tank-solid CNC aluminum frame for stability.
OfficeRedragon UCAL K673
  • •Offers tri-mode connectivity (Bluetooth, 2.4GHz, wired) for flexible device switching.
  • •Lighter weight and plastic case may be easier to reposition on a desk.
  • •Includes height-adjustable feet, according to its vendor page.
ProgrammingTie
  • •Both share the same 75% layout with 81 keys and a control knob.
  • •Both feature gasket mount designs and sound-dampening foam for a comfortable typing feel.
  • •The Penumbra has PBT keycaps, while the UCAL's keycap material is not specified.
TravelRedragon UCAL K673
  • •Wireless operation removes the need to manage a cable on the go.
  • •Lighter at 1240g compared to the Penumbra's 1500g.
  • •Large 4000mAh battery supports long use without charging.
ModdingRedragon PENUMBRA K687 HE
  • •Comes with four spare Hall Effect switches and a switch puller in the box.
  • •Uses a standard PBT keycap material, which is widely available for aftermarket replacement.
  • •Vendor description details a five-layer noise dampening system including PO foam, IXPE foam, PET pad, and silicone.
Content CreationTie
  • •Both keyboards include a multi-function control knob for media and volume adjustment.
  • •Both have RGB backlighting for visual customization.
  • •The compact 75% layout saves desk space for other peripherals on both models.

Frequently Asked Questions (FAQ)

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