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Head to head · Prices checked Oct 21, 2026

Keychron C0 HE One Handed vs MMD KM40

Get the Keychron C0 HE One Handed for hall effect and rapid trigger.

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 One Handed

MMD KM40

  • Hall effect (magnetic)

    Yes

    No

  • Rapid trigger

    Yes

    No

  • Connection

    Wired

    Bluetooth, 2.4 GHz, Wired

  • Case material

    Plastic

    Aluminum

  • Switch options

    Magnetic

    Linear, Tactile

KeebFinder scores

How we score
  • Keychron C0 HE One Handed
  • MMD KM40
Performance
92
61
Build quality
55
83
Productivity
51
69
Customizability
60
84
Portability
67
84

What they share

  • Layout size: 40%
  • Hot-swappable
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 One Handed

No owner reviews collected yet.

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 One Handed vs MMD KM40 specs

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

14 of 23 specs differ

Keychron C0 HE One Handed

MMD KM40

Typing & switches

Switch options

Magnetic
Linear, Tactile

Hall effect (magnetic)

Yes
No

Rapid trigger

Yes
No

Hot-swappable

Yes
Yes

Mount style

Tray Mount
Gasket Mount

Sound dampening

No
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

—
620 g

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.

  • MKUS

    In stock
    $59Visit
  • AmazonGlobal

    Check price
    ~$59Visit
MMD KM402 stores
  • MonacoKeysDE

    In stock
    $84Visit
  • AmazonGlobal

    Check price
    ~$84Visit

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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