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Head to head · Prices checked Oct 21, 2026

Ajazz AK820 AS vs Keychron J2

Get the Ajazz AK820 AS for knob. Get the Keychron J2 for qmk and via.

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.

Ajazz AK820 AS

Keychron J2

  • Connection

    Wired

    Bluetooth, 2.4 GHz, Wired

  • Knob

    Yes

    No

  • QMK

    No

    Yes

  • VIA

    No

    Yes

  • Sound dampening

    No

    Yes

KeebFinder scores

How we score
  • Ajazz AK820 AS
  • Keychron J2
Performance
60
70
Build quality
76
71
Productivity
82
74
Customizability
70
86
Portability
67
73

What they share

  • Layout size: 75%
  • Hot-swappable
  • Switch options: Clicky, Linear, Tactile
  • 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.

Ajazz AK820 AS

No owner reviews collected yet.

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

Full specs

Ajazz AK820 AS vs Keychron J2 specs

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

10 of 23 specs differ

Ajazz AK820 AS

Keychron J2

Typing & switches

Switch options

Clicky, Linear, Tactile
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
—

Sound dampening

No
Yes

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
None

Media keys

No
Yes

Connectivity & battery

Connection

Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

—
1,000 Hz

Battery

Wired only
3,750 mAh

USB-C

Yes
No

Build & materials

Case material

Aluminum, Plastic
—

Keycaps

PBT
PBT

Weight

810 g
—

Dimensions

40 x 136 x 327 mm
—

Backlight

White, north-facing
RGB

Firmware & software

QMK

No
Yes

VIA

No
Yes

Mac & Windows

Yes
No

Extras

Released

2023
2025

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

  • AmazonGlobal

    Check price
    ~$39Visit
  • WhatGeekCN

    Out of stock
    $39Visit
Keychron J23 stores
  • KeychronHK

    In stock
    $59Visit
  • Keychron (DE)DE

    In stock
    $105Visit
  • AmazonGlobal

    Check price
    ~$59Visit

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