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Compare Coolkiller ROCOCO Numpad vs MMD KM21 Ultra Differences Side by Side

Explore the comprehensive side-by-side comparison of the Coolkiller ROCOCO Numpad and MMD KM21 Ultra and view their biggest differences. The detailed comparison table allows you to see all the essential features, specifications, and benefits of each keyboard at a glance. Whether you're looking for performance, value, or specific functionalities, this comparison tool helps you make an informed decision.

62
CoolKiller ROCOCO Hot-swappable Wireless Number Pad
85
MMD KM21 Ultra - QMK/VIA Wireless Aluminium Macropad Numpad

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  • Released in 2024
  • Uses a Gasket Mount mounting style
  • Made with a ABS case
  • Offers Yes, Rgb, South-face, Rgb South-face RGB lighting
  • Released in 2026
  • Comes with a knob
  • Connects via USB-C
  • Supports QMK firmware
  • Supports VIA configuration
  • Uses a Top Mount mounting style
  • Equipped with a 980 mAh battery
  • Made with a Aluminum case
  • Offers Yes, Rgb RGB lighting
Scores
  • Performance: 56.9
  • Build Quality: 61.9
  • Productivity: 60.8
  • Customizability: 63.5
  • Portability: 83.4
Scores
  • Performance: 66.7
  • Build Quality: 81.6
  • Productivity: 89.3
  • Customizability: 89.7
  • Portability: 85.9
Name
Coolkiller ROCOCO Numpad
Name
MMD KM21 Ultra
Release year
2024
Release year
2026
Switch Options
-
Switch Options
-
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
Numpad
Layout Size
Numpad
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
Bluetooth, 2.4 GHz, Wired, Wireless
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
-
Polling Rate
-
Battery capacity
-
Battery capacity
980 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
Top Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, South-face
Backlight
 
Rgb
Case Colors
Case Colors
Case Material
ABS
Case Material
Aluminum
Keycaps Material
-
Keycaps Material
-
Dimensions
-
Dimensions
-
Weight
-
Weight
-
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