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Head to head · Prices checked Oct 21, 2026

Cidoo Nebula vs Keychron J3 SE

Get the Cidoo Nebula for knob. Get the Keychron J3 SE for the 4,000 mAh battery and qmk.

CIDOO Nebula VIA Keyboard Kit

Knob

Cidoo Nebula

3.4 · 48 reviews

from$55at Mechkeys

Shop nowSee all prices
Keychron J3 SE QMK Wireless Mechanical Keyboard

Battery

Keychron J3 SE

5.0 · 1 reviews

from$129at Keychron

Shop nowSee all prices

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.

Cidoo Nebula

Keychron J3 SE

  • Layout size

    65%

    96%

  • Battery

    3,000 mAh

    4,000 mAh

  • Knob

    Yes

    No

  • Weight

    457 g

    1,145 g

  • QMK

    No

    Yes

KeebFinder scores

How we score
  • Cidoo Nebula
  • Keychron J3 SE
Performance
48
80
Build quality
63
68
Productivity
74
89
Customizability
85
86
Portability
88
57

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Case material: ABS
  • VIA
See every spec side by side

From real owners

What owners say

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

Cidoo Nebula

3.4

48 owner reviews

Praise
“Overly happy! the material is really good and the keyboard is way beyond expectations. One of the best company and support ive seen!”
Lumia M.Verified buyer· via Epomaker
Critique
“The keyboard itself is lovely but one of the key isn't working at all and the key next to it also doesn't work when pressed normally, you have to hit it hard...”
Seo L.Verified buyer· via Epomaker

Keychron J3 SE

5.0

1 owner reviews

Praise
“I love the keyboard! Everything was as expected but the keys are even smoother than I could have hoped for. I love the color, it matches exactly what was displayed on the website. Setup was very easy once I actually read the manual. I like that it gives you…”
Nathalia N.· via Keychron

Full specs

Cidoo Nebula vs Keychron J3 SE specs

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

10 of 23 specs differ

Cidoo Nebula

Keychron J3 SE

Typing & switches

Switch options

—
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
—

Sound dampening

No
Yes

Layout

Layout size

65%
96%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
None

Connectivity & battery

Connection

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

Max polling rate

—
1,000 Hz

Battery

3,000 mAh
4,000 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

ABS
ABS

Keycaps

—
PBT

Weight

457 g
1,145 g

Dimensions

35 x 120 x 325 mm
43 x 406 x 139 mm

Backlight

RGB
RGB, north-facing

Firmware & software

QMK

No
Yes

VIA

Yes
Yes

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2023
2026

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

Cidoo Nebula2 stores
  • MechkeysCN

    In stock
    $55Visit
  • AmazonGlobal

    Check price
    ~$55Visit
  • KeychronHK

    In stock
    $129Visit
  • AmazonGlobal

    Check price
    Visit

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