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Head to head · Prices checked Oct 21, 2026

Keychron J2 vs Redragon UCAL MAX K673

Get the Keychron J2 for qmk and via. Get the Redragon UCAL MAX K673 for the 4,000 mAh battery and knob.

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 J2

Redragon UCAL MAX K673

  • Battery

    3,750 mAh

    4,000 mAh

  • Switch options

    Clicky, Linear, Tactile

    Linear

  • Knob

    No

    Yes

  • QMK

    Yes

    No

  • VIA

    Yes

    No

KeebFinder scores

How we score
  • Keychron J2
  • Redragon UCAL MAX K673
Performance
70
67
Build quality
71
64
Productivity
74
70
Customizability
86
59
Portability
73
76

What they share

  • Layout size: 75%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Sound dampening
  • 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 J2

4.4

11 owner reviews

Praise
“I absolutely love this keyboard. It sounds amazing and the red switches are so smooth in feel. The colours are also great.”
WojciechVerified buyer· via Keychron
Critique
“The keyboard is nice, but it took over 3 weeks of shipping to arrive. On their website it says they deliver in a week or under to the US.”
JaydenVerified buyer· via Keychron

Redragon UCAL MAX K673

No owner reviews collected yet.

Full specs

Keychron J2 vs Redragon UCAL MAX K673 specs

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

8 of 22 specs differ

Keychron J2

Redragon UCAL MAX K673

Typing & switches

Switch options

Clicky, Linear, Tactile
Linear

Hot-swappable

Yes
Yes

Mount style

—
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
None

Media keys

Yes
No

Connectivity & battery

Connection

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

Max polling rate

1,000 Hz
—

Battery

3,750 mAh
4,000 mAhBetter

USB-C

No
Yes

Build & materials

Case material

—
Plastic

Keycaps

PBT
PBT

Weight

—
1,200 g

Dimensions

—
37 x 335 x 37 mm

Backlight

RGB
RGB

Firmware & software

QMK

Yes
No

VIA

Yes
No

Extras

Released

2025
2024

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

Keychron J23 stores
  • KeychronHK

    In stock
    $59Visit
  • Keychron (DE)DE

    In stock
    $105Visit
  • AmazonGlobal

    Check price
    ~$59Visit
  • RedragonCN

    In stock
    $69Visit
  • AmazonGlobal

    Check price
    ~$69Visit

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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