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Head to head · Prices checked Oct 25, 2026

Keychron K3 HE vs MelGeek O2

Get the Keychron K3 HE for hall effect and rapid trigger.

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O2 Tri-mode Wireless Mechanical Keyboard

MelGeek O2

from$109at MelGeek

90-day low

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What actually differs

The differences that matter

Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.

Keychron K3 HE

MelGeek O2

  • Layout size

    75%

    Numpad

  • Hall effect (magnetic)

    Yes

    No

    Adjustable actuation helps in games and not in normal typing

  • Rapid trigger

    Yes

    No

    Faster resets help in games and not in normal typing

  • Hot-swappable

    Yes

    No

    Switch changes without soldering

  • Battery

    2,600 mAh

    2,500 mAh

    A larger battery means fewer cables during the day

KeebFinder scores

How we score
  • Keychron K3 HE
  • MelGeek O2
Performance
92
54
Build quality
86
65
Productivity
88
53
Customizability
89
50
Portability
82
82

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Max polling rate: 1,000 Hz
  • Sound dampening
  • Keycaps: PBT
See every spec side by side

Full specs

Keychron K3 HE vs MelGeek O2 specs

Every tracked spec, side by side. Rows marked with a dot differ between the boards.

19 of 27 specs differ

Keychron K3 HE

MelGeek O2

Typing & switches

Switch options

Clicky, Linear, Magnetic, Tactile
—

Hall effect (magnetic)

Yes
No

Rapid trigger

Yes
No

Hot-swappable

Yes
No

Mount style

Tray Mount
Gasket Mount

Low profile

Yes
No

Sound dampening

Yes
Yes

Layout

Layout size

75%
Numpad

Layout standard

ANSI, ISO, ISO-DE, ISO-ES, ISO-FR, JIS
ANSI

Ergonomics

Standard
Standard

Display

LED
None

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

1,000 Hz
1,000 Hz

Battery

2,600 mAhBetter
2,500 mAh

USB-C

Yes
No

Build & materials

Case material

ABS, Aluminum, Wood
ABS, Aluminum, Polycarbonate

Plate material

Aluminum
Polycarbonate

Keycaps

PBT
PBT

Weight

580 g
650 g

Dimensions

25 x 319 x 126 mm
135 x 326 x 27 mm

Typing angle

2°
4°

Backlight

RGB, north-facing
RGB, north-facing

Firmware & software

QMK

Yes
No

VIA

Yes
No

N-key rollover

Yes
No

Mac & Windows

Yes
Yes

Extras

Released

2026
2025

Where to buy

Compare prices

Live prices from the stores we track, cheapest in-stock offer first.

Prices in USD are converted to your currency and can change at any time. KeebFinder may earn a commission when you buy through these links, at no extra cost to you.

Lowest price across stores, Amazon excluded.

MelGeek O22 stores

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