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

This comparison is for buyers deciding between two of Redragon's popular 75% tri-mode keyboards. The choice hinges on whether you prioritize a premium, heavy-duty aluminum construction with extensive sound dampening or a lighter, more portable plastic build at a lower cost. Both share a gasket mount, hot-swappable sockets, PBT keycaps, and a dedicated control knob, making the core decision about material quality and acoustics versus weight and price.

Model
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Rating	0.0 stars (0 reviews)	0.0 stars (0 reviews)
Purchase Options
Main differences	Released in 2024 Features N-key rollover Weighs about 1800 g Sized at 43 x 132 x 43 mm Made with a Aluminum case	Released in 2023 Equipped with a 4000 mAh battery Weighs about 1200 g Sized at 37 x 335 x 37 mm Made with a Plastic case
Score	Scores Performance: 79.5 Build Quality: 72.9 Productivity: 71.2 Customizability: 61.9 Portability: 74.8	Scores Performance: 65.2 Build Quality: 63.1 Productivity: 69.6 Customizability: 58.7 Portability: 75.7
Name	Name Redragon PENUMBRA K687 Pro	Name Redragon UCAL K673 Pro
Release year	Release year 2024	Release year 2023
Switch Options	Switch Options Linear	Switch Options Linear
Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size 75%	Layout Size 75%
Layout Standard	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	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	Connection Bluetooth, 2.4 GHz, Wired, Wireless	Connection Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate	Polling Rate -	Polling Rate -
Battery capacity	Battery capacity -	Battery capacity 4000 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	Mount Style Gasket Mount	Mount Style Gasket Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight Rgb	Backlight Rgb
Case Colors	Case Colors	Case Colors
Case Material	Case Material Aluminum	Case Material Plastic
Keycaps Material	Keycaps Material PBT	Keycaps Material PBT
Dimensions	Dimensions 43 x 132 x 43 mm	Dimensions 37 x 335 x 37 mm
Weight	Weight 1800g	Weight 1200g

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Pros and Trade-offs

Your budget and priority for material quality dictate the choice here. If you want the heft, acoustic refinement, and durability of an aluminum chassis and are willing to pay more for it, the Redragon PENUMBRA K687 Pro is the clear selection. If you need a capable, lightweight wireless keyboard for general use and want to spend less, the Redragon UCAL K673 Pro delivers excellent core features in a plastic package.

Redragon PENUMBRA K687 Pro

+CNC aluminum case construction for a solid, premium feel.
+Extensive 5-layer noise dampening system including multiple foam types and a PET sound pad.
+Includes four spare switches in the package.
+Heavier 1800g weight enhances desk stability.
+N-Key Rollover is specifically listed as a feature.

−Higher price point compared to the UCAL model.
−Heavier weight (1800g) reduces portability.
−Does not include a keycap puller, only a switch puller is implied by spare switches.

Redragon UCAL K673 Pro

+More affordable price point.
+Lighter weight (1200g) for easier portability and desk adjustment.
+Package includes a dedicated keycap and switch puller.
+Features a built-in dongle storage socket to prevent loss.

−Plastic case construction versus aluminum.
−Simpler 2-layer sound dampening system.
−Vendor description lists a 3000mAh battery, while metadata suggests 4000mAh, causing potential confusion.
−N-Key Rollover is not explicitly listed as a feature.

Which Keyboard Is Better for Your Needs?

The PENUMBRA K687 Pro wins for use cases where build solidity, acoustic quality, and a premium feel are paramount, such as gaming, modding, and content creation. The UCAL K673 Pro is the better pick for office users and travelers who value a lighter keyboard and a lower price. For programming, both keyboards are equally capable due to their shared core layout and hot-swap features.

GamingRedragon PENUMBRA K687 Pro

•Heavier CNC aluminum frame provides more stability during intense use.
•The manufacturer lists a more extensive 5-layer noise dampening system for a cleaner acoustic profile.
•Includes N-Key Rollover as a listed feature for simultaneous key presses.

OfficeRedragon UCAL K673 Pro

•Lighter weight (1200g vs 1800g) makes it easier to reposition on a desk.
•Lower price point offers better value for general office tasks.
•Includes a keycap and switch puller in the box for basic maintenance.

ProgrammingTie

•Both use the same 75% layout with dedicated function keys for efficiency.
•Both feature hot-swappable sockets for customizing switch feel.
•Both have a dedicated control knob for quick media and brightness adjustments.

TravelRedragon UCAL K673 Pro

•Significantly lighter at 1200g compared to 1800g.
•Smaller listed dimensions (37mm height vs 43mm) may aid portability.
•Plastic case is less susceptible to cosmetic damage from transport.

ModdingRedragon PENUMBRA K687 Pro

•CNC aluminum case offers a more premium foundation for modifications.
•Vendor description details a 5-layer dampening system including PO foam, IXPE switch foam, PET sound pad, bottom socket foam, and silicone pad.
•Comes with four spare switches for testing replacements.

Content CreationRedragon PENUMBRA K687 Pro

•Premium aluminum build and dampened acoustics are better for microphone pickup in recordings.
•Dedicated knob allows for smooth volume scrubbing and playback control.
•Heavier base reduces movement during vigorous typing or shortcut use.