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O2 Tri-mode Wireless Mechanical Keyboard

MelGeek O2

The MelGeek O2 is a compact mechanical keyboard designed primarily for Mac users who want seamless integration with Apple devices and a quiet, comfortable typing experience. It suits professionals and students needing reliable multi-device connectivity and a familiar Mac layout. Its lightweight design and adjustable angles make it practical for mobile work and extended typing sessions.</p... Read more
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O2 Tri-mode Wireless Mechanical Keyboard

MelGeek
MelGeek
Ships to US
$129
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Compare MelGeek O2 vs Keychron Q0 HE vs Sikakeyb SK3 Mountain City Specification

Compare similar keyboards side by side, or use the comparison table to compare all keyboards!
MelGeek O2Keychron Q0 HESikakeyb SK3 Mountain City
O2 Tri-mode Wireless Mechanical Keyboard
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Keychron Q0 HE QMK Wireless Custom Number Pad
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SIKAKEYB SK3 Mountain City Hot-swap 68keys Aluminum Gasket Kit
0.0 (0)
5.0 (4)
0.0 (0)
  • Released in 2025
  • Equipped with a 2500 mAh battery
  • Weighs about 650 g
  • Sized at 135 x 326 x 27 mm
  • Made with a Aluminum, Polycarbonate, ABS case
  • Offers Yes, Rgb, North-face, Rgb North-face RGB lighting
  • Released in 2026
  • Has Linear, Tactile, Clicky, Magnetic switch options
  • Comes with a knob
  • Connects via USB-C
  • Utilizes Hall effect sensors
  • Supports QMK firmware
  • Supports VIA configuration
  • Features N-key rollover
  • Includes screw-in stabilizers
  • Equipped with a 1800 mAh battery
  • Weighs about 684 g
  • Sized at 34 x 137 x 118 mm
  • Made with a Aluminum, Copper case
  • Offers Yes, Rgb, White, South-face, Rgb South-face, White South-face RGB lighting
  • Released in 2022
  • Equipped with a 1900 mAh battery
  • Made with a Aluminum case
  • Offers Yes, Rgb RGB lighting
Scores
  • Performance: 54.6
  • Build Quality: 65.7
  • Productivity: 53.8
  • Customizability: 50.8
  • Portability: 82.6
Scores
  • Performance: 84.1
  • Build Quality: 90.3
  • Productivity: 94.3
  • Customizability: 92.6
  • Portability: 87.2
Scores
  • Performance: 44.9
  • Build Quality: 61.7
  • Productivity: 51
  • Customizability: 75.9
  • Portability: 84.1
Name
MelGeek O2
Name
Keychron Q0 HE
Name
Sikakeyb SK3 Mountain City
Release year
2025
Release year
2026
Release year
2022
Switch Options
-
Switch Options
Linear, Tactile, Clicky, Magnetic
Switch Options
-
Profile
Normal Profile
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Hot Swappable
 
Layout Size
Numpad
Layout Size
Numpad
Layout Size
Numpad
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
 
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
1000 Hz
Polling Rate
1000 Hz
Polling Rate
-
Battery capacity
2500 mAh
Battery capacity
1800 mAh
Battery capacity
1900 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
Gasket Mount
Mount Style
Gasket Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, North-face
Backlight
 
Rgb, White, South-face, White South-face
Backlight
 
Rgb
Case Colors
Case Colors
Case Colors
Case Material
Aluminum, Polycarbonate, ABS
Case Material
Aluminum, Copper
Case Material
Aluminum
Keycaps Material
PBT
Keycaps Material
PBT
Keycaps Material
-
Dimensions
135 x 326 x 27 mm
Dimensions
34 x 137 x 118 mm
Dimensions
-
Weight
650g
Weight
684g
Weight
-
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Product Description

The MelGeek O2 is a compact mechanical keyboard designed primarily for Mac users who want seamless integration with Apple devices and a quiet, comfortable typing experience. It suits professionals and students needing reliable multi-device connectivity and a familiar Mac layout. Its lightweight design and adjustable angles make it practical for mobile work and extended typing sessions.

Key Features

  • Tri-mode connectivity supports Bluetooth, 2.4G wireless, and wired use, allowing connection to up to eight devices for easy multitasking.
  • Switching between Mac and Windows layouts is straightforward, with included Windows keycaps and a hotkey toggle.
  • Long battery life with a 2500mAh cell and low power mode reduces charging frequency.
  • 1000Hz polling rate in wired and 2.4G modes provides responsive input for fast typing or light gaming.

Build Quality

  • Aluminum alloy top frame offers a solid, textured surface.
  • Transparent PC top cover adds visual clarity and a unique aesthetic.
  • Vibrant ABS base adds color but may be less durable than metal or PBT materials.
  • Gasket mount with sound-dampening layers improves typing feel and reduces noise.
  • Magnetic TPU feet allow angle adjustment to reduce wrist strain.

Typing Experience

  • Custom Kailh Sunlight switches provide smooth, soft feedback suitable for long typing sessions.
  • Quiet operation at about 45dB fits office or study environments.
  • Dye-sublimated PBT keycaps resist sweat and oil, maintaining texture over time.
  • Keycap contours improve finger comfort and reduce fatigue.

Compatibility

  • Designed for deep Mac integration, including native F-key functions and magnetic feet sized for MacBook placement.
  • Also compatible with Windows and other systems, with easy layout switching.
  • Some Mac models may require adjustments for keyboard wake-up settings to avoid delays.

Trade-offs

  • The vibrant ABS base may show wear faster than full metal or PBT cases.
  • Bluetooth range is limited to about 10 meters, which may restrict use in larger spaces.
  • Wake-up delays on some Mac models require manual configuration.
  • While the keyboard is slim and portable, it may lack some advanced programmability found in enthusiast boards.

Frequently Asked Questions (FAQ)

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