Head to head · Prices checked Nov 10, 2026

Keychron K2 Ultra vs MelGeek O2

Get the Keychron K2 Ultra for hot-swappable and the 4,000 mAh battery.

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Hot-swappable

Keychron K2 Ultra

5.0 (3)5.0 · 3 reviews

from$119at MK

Compare 4 stores

MelGeek O2

O2 Tri-mode Wireless Mechanical Keyboard

No reviews

from$109at MelGeek

90-day lowLowest price in 90 days

Compare 2 stores

Quick verdict

Which one should you get?

Get the

Keychron K2 Ultra

Hot-swappable

Build quality in the top 10% of 75% boards under $150.

Rules this board out

South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
No numpad.

$119 at MK

Get the

MelGeek O2

Build quality in the top 50% of Numpad boards under $150.

Rules this board out

Switches are soldered. Swapping them means soldering.
North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
Numpad only. This is not a full keyboard.

$109 at MelGeek

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 K2 Ultra

MelGeek O2

Layout size
75%
Numpad
Hot-swappable
Yes
No
Switch changes without soldering
Battery
4,000 mAh
2,500 mAh
A larger battery means fewer cables during the day
Max polling rate
8,000 Hz
1,000 Hz
Higher polling helps competitive FPS and does nothing for typing
Case material
ABS, Aluminum
ABS, Aluminum, Polycarbonate

KeebFinder scores

How we score

Keychron K2 Ultra
MelGeek O2

Performance: 90
54
Build quality: 86
65
Productivity: 94
53
Customizability: 92
50
Portability: 82
82

What they share

Connection: Bluetooth, 2.4 GHz, Wired
Mount style: Gasket Mount
Sound dampening
Keycaps: PBT

See every spec side by side

Full specs

Keychron K2 Ultra vs MelGeek O2 specs

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

17 of 26 specs differ

Spec

Keychron K2 Ultra

MelGeek O2

Typing & switches

Switch options

Clicky, Linear, Tactile

—

Hot-swappable

Yes

Mount style

Gasket Mount

Sound dampening

Yes

Screw-in stabilizers

Yes

Layout

Layout size

75%

Numpad

Layout standard

ANSI, ISO, ISO-ES, ISO-FR, ISO-IT

ANSI

Ergonomics

Standard

Display

None

Media keys

Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired

Max polling rate

8,000 HzBetter

1,000 Hz

Battery

4,000 mAhBetter

2,500 mAh

USB-C

Yes

Build & materials

Case material

ABS, Aluminum

ABS, Aluminum, Polycarbonate

Plate material

Steel

Polycarbonate

Keycaps

PBT

Weight

1,084 g

650 g

Dimensions

31 x 312 x 122 mm

135 x 326 x 27 mm

Typing angle

—

4°

Backlight

RGB, south-facing

RGB, north-facing

Firmware & software

QMK

Yes

VIA

Yes

N-key rollover

Yes

Mac & Windows

Yes

Extras

Released

2026

2025

For EU buyers

ISO layouts by store

Which stores sell ISO-DE, UK, and the other regional layouts.

Keychron K2 Ultra

Keychron (DE)
ISO-FR, ISO-ES, ISO-IT
In stockDoes not ship to you

MelGeek O2

No ISO layout at the stores we track.

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.

Keychron K2 Ultra4 stores