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Head to head · Prices checked Oct 21, 2026

Keychron K2 Ultra vs Keydous NJ81

Get the Keychron K2 Ultra for qmk.

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

Keydous NJ81

  • Case material

    ABS, Aluminum

    Plastic

  • Switch options

    Clicky, Linear, Tactile

    Clicky, Linear

  • Display

    None

    Yes

  • Weight

    1,084 g

    970 g

  • QMK

    Yes

    No

KeebFinder scores

How we score
  • Keychron K2 Ultra
  • Keydous NJ81
Performance
90
49
Build quality
86
55
Productivity
94
65
Customizability
92
79
Portability
82
80

What they share

  • Layout size: 75%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Battery: 4,000 mAh
  • Mount style: Gasket Mount
  • Keycaps: PBT
See every spec side by side

From real owners

What owners say

Ratings and quotes collected from verified store reviews, including the critical ones.

Keychron K2 Ultra

4.0

4 owner reviews

Praise
“very compact, build quality is great, and I don't even feel any latency when using the keyboard wireless.”
AnonymousVerified buyer· via Keychron
Critique
“The only "zmk" support is from the launcher itself and its missing most of the ZMK features. For example Combos!”
Juan· via Keychron

Keydous NJ81

No owner reviews collected yet.

Full specs

Keychron K2 Ultra vs Keydous NJ81 specs

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

15 of 25 specs differ

Keychron K2 Ultra

Keydous NJ81

Typing & switches

Switch options

Clicky, Linear, Tactile
Clicky, Linear

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
No

Screw-in stabilizers

Yes
No

Layout

Layout size

75%
75%

Layout standard

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

Ergonomics

Standard
Standard

Display

None
Yes

Media keys

Yes
No

Connectivity & battery

Connection

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

Max polling rate

8,000 Hz
—

Battery

4,000 mAh
4,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

ABS, Aluminum
Plastic

Plate material

Steel
Brass, Steel

Keycaps

PBT
PBT

Weight

1,084 g
970 g

Dimensions

31 x 312 x 122 mm
36 x 134 x 315 mm

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

Yes
No

VIA

Yes
No

N-key rollover

Yes
No

Mac & Windows

Yes
Yes

Extras

Released

2026
2022

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

  • KeychronHK

    In stock
    $119Visit
  • MKUS

    In stock
    $119Visit
  • Keychron (DE)DE

    In stock
    $150Visit
  • AmazonGlobal

    Check price
    Visit
Keydous NJ812 stores
  • MechkeysCN

    In stock
    $99Visit
  • AmazonGlobal

    Check price
    ~$99Visit

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.

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