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Compare Redragon K721 vs UCAL K673 Differences Side by Side

This comparison is for buyers deciding between two similarly priced Redragon 75% keyboards with fundamentally different priorities. The K721 is a wired-only specialist focused on ultra-responsive gaming with Hall effect magnetic switches and an 8000Hz polling rate. The UCAL K673 is a tri-mode wireless board emphasizing quiet operation, connectivity options, and a media knob. The decision is difficult because both share a compact layout and gasket mount, but their core technologies and intended use cases diverge sharply.

60
Redragon K721 Wired Mechanical Keyboard Magnetic Switches
UCAL K673 DE

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  • Has Linear, Magnetic switch options
  • Supports hot-swappable switches
  • Utilizes Hall effect sensors
  • Features N-key rollover
  • Enables rapid trigger functionality
  • Supports Wired, Wired only connectivity
  • Runs at a 8000 Hz polling rate
  • Weighs about 803 g
  • Sized at 43 x 335 x 140 mm
  • Comes with a knob
  • Provides dedicated media keys
  • Connects via USB-C
  • Has built-in sound dampening
  • 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: 97.8
  • Build Quality: 58.1
  • Productivity: 51.3
  • Customizability: 54.3
  • Portability: 58
Scores
  • Performance: 62.1
  • Build Quality: 58
  • Productivity: 63.3
  • Customizability: 54.1
  • Portability: 73.5
Name
Redragon K721
Name
Redragon UCAL K673
Release year
2025
Release year
2025
Switch Options
Linear, 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
8000 Hz
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
-
Case Material
Plastic
Keycaps Material
-
Keycaps Material
-
Dimensions
43 x 335 x 140 mm
Dimensions
104 x 335 mm
Weight
803g
Weight
1240g
*Something incorrect or missing? Please
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Pros and Trade-offs

Your primary need dictates the choice. If competitive gaming performance with the fastest possible response is your goal, the Redragon K721 is the dedicated tool. If you value a clean desk, need to connect to multiple devices, or work in shared spaces where quiet typing is important, the Redragon UCAL K673's wireless features and sound-dampened design make it the more versatile daily driver.

Redragon K721

  • +Features adjustable Hall effect magnetic switches with a wide actuation range (0.01mm-3.5mm).
  • +High 8000Hz polling rate for minimal input latency.
  • +Includes Rapid Trigger technology for gaming.
  • +Lighter weight at 803g compared to the K673.
  • −Wired-only connectivity limits placement and device switching.
  • −Lacks the dedicated media knob and sound-dampening foams found on the K673.
  • −No mention of included accessories like a switch puller in its vendor description.

Redragon UCAL K673

  • +Offers tri-mode connectivity (Bluetooth, 2.4GHz, and wired).
  • +Includes a ONE-Knob for media and lighting control.
  • +Features sound dampening with 3.5mm PO foam and a silicone pad.
  • +Comes with a 4000mAh battery and accessories like a switch puller and spare switches.
  • −Lower 1000Hz polling rate compared to the K721's 8000Hz.
  • −Significantly heavier at 1240g.
  • −Uses standard linear red switches instead of adjustable Hall effect switches.

Which Keyboard Is Better for Your Needs?

The K721 is the clear choice for gaming due to its high polling rate and Hall effect switches with Rapid Trigger. For office, travel, and content creation, the K673's wireless versatility, media knob, and sound-dampened design are more practical. Programming is a tie, as both offer a compact layout and hot-swap sockets, leaving the choice to personal preference for wired performance or wireless convenience.

GamingRedragon K721
  • •The K721 has an 8000Hz polling rate for a 0.125ms response time, compared to the K673's 1000Hz.
  • •It features adjustable Hall effect magnetic switches with Rapid Trigger technology for faster, repeated inputs.
  • •The K721's vendor description highlights its design for competitive FPS gaming.
OfficeRedragon UCAL K673
  • •The K673 offers tri-mode connectivity (Bluetooth, 2.4GHz, wired) for easy switching between devices.
  • •Its vendor description emphasizes sound dampening with 3.5mm PO foam and a silicone pad for quieter typing.
  • •It includes a dedicated ONE-Knob for media and lighting control, enhancing productivity.
ProgrammingTie
  • •Both keyboards use a space-saving 75% layout, preserving most essential keys.
  • •Both feature hot-swappable switches, allowing for customization of switch feel.
  • •The K673's quieter typing may be preferable in shared spaces, while the K721's adjustable actuation could be tuned for typing.
TravelRedragon UCAL K673
  • •The K673's wireless operation removes the need for a cable connection on the go.
  • •It includes a large 4000mAh battery for extended cordless use.
  • •Its vendor description states it is ideal for environments without constant power.
ModdingRedragon K721
  • •The K721's Hall effect magnetic switches offer adjustable actuation points from 0.01mm to 3.5mm, a unique tuning feature.
  • •Both are hot-swappable, but the K721's switch technology provides a distinct modding avenue not present on the K673.
Content CreationRedragon UCAL K673
  • •The K673's ONE-Knob provides direct control over volume and playback, useful for video and audio editing.
  • •Its multi-device wireless connectivity is convenient for managing a workflow across a computer and tablet.
  • •The quieter, damped sound profile is less likely to interfere with microphone audio during recording.

Frequently Asked Questions (FAQ)

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