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Head to head · Prices checked Oct 21, 2026

Keychron C0 HE vs MMD KM40

Get the Keychron C0 HE for hall effect.

MMD KM40 - 40% Wireless Aluminium Keyboard

MMD KM40

5.0 · 4 reviews

from$84at MonacoKeys

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.

Keychron C0 HE

MMD KM40

  • Hall effect (magnetic)

    Yes

    No

  • Connection

    Wired

    Bluetooth, 2.4 GHz, Wired

  • Case material

    Plastic

    Aluminum

  • Switch options

    Clicky, Linear, Magnetic, Tactile

    Linear, Tactile

  • Mount style

    Tray Mount

    Gasket Mount

KeebFinder scores

How we score
  • Keychron C0 HE
  • MMD KM40
Performance
86
61
Build quality
58
83
Productivity
60
69
Customizability
62
84
Portability
68
84

What they share

  • Layout size: 40%
  • Hot-swappable
  • Sound dampening
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 C0 HE

4.0

10 owner reviews

Praise
“The layout is more comfortable than the razor. The pad isn't very soft and it would be nice if it had a tilt adjustment. I like that it includes shine through keycaps unlike their backlit keyboards. I'm happy I bought it.”
DarryllVerified buyer· via Keychron
Critique
“Make it ortholinear or columnar staggered and I'll buy it. I have an ageing Razor Nostromo and I want to replace it with something that has real Linux support (and the ZSA Moonlander it too expensive).”
Jason F.· via Keychron

MMD KM40

5.0

4 owner reviews

Praise
“Keycaps are dyesub, but still PBT Tactile switches feature a proper tactile feeling with great typing experience The case feels and looks really premium layer activation could be nicer but in the end you just gotta get used to the board”
Andi· via MonacoKeys

Full specs

Keychron C0 HE vs MMD KM40 specs

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

13 of 23 specs differ

Keychron C0 HE

MMD KM40

Typing & switches

Switch options

Clicky, Linear, Magnetic, Tactile
Linear, Tactile

Hall effect (magnetic)

Yes
No

Hot-swappable

Yes
Yes

Mount style

Tray Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

40%
40%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Display

None
None

Connectivity & battery

Connection

Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

8,000 Hz
—

Battery

Wired only
2,000 mAh

USB-C

No
Yes

Build & materials

Case material

Plastic
Aluminum

Plate material

Aluminum
Polycarbonate

Keycaps

ABS
PBT

Weight

450 g
620 g

Dimensions

39 x 149 x 245 mm
—

Backlight

RGB, north-facing
RGB

Firmware & software

QMK

No
Yes

VIA

No
Yes

Mac & Windows

Yes
No

Extras

Released

2026
2026

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
    ~$59Visit
  • KeychronHK

    Out of stock
    $59Visit
  • Keychron (DE)DE

    Out of stock
    $85Visit
MMD KM402 stores
  • MonacoKeysDE

    In stock
    $84Visit
  • AmazonGlobal

    Check price
    ~$84Visit

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