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Head to head · Prices checked Oct 21, 2026

Keychron Q9 vs MMD KM40

Get the Keychron Q9 for knob.

Keychron Q9 QMK Custom Mechanical Keyboard - Image: 7

Knob

Keychron Q9

4.7 · 6 reviews

from$59at Keychron

Shop nowCompare 3 stores
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 Q9

MMD KM40

  • Connection

    Wired

    Bluetooth, 2.4 GHz, Wired

  • Ergonomics

    Split Spacebar

    Standard

  • Switch options

    Clicky, Linear, Tactile

    Linear, Tactile

  • Mount style

    Gasket Mount, PCB Mount, Plate Mount

    Gasket Mount

  • Knob

    Yes

    No

KeebFinder scores

How we score
  • Keychron Q9
  • MMD KM40
Performance
66
61
Build quality
91
83
Productivity
94
69
Customizability
96
84
Portability
70
84

What they share

  • Layout size: 40%
  • Hot-swappable
  • Case material: Aluminum
  • QMK
  • VIA
  • 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 Q9

4.7

6 owner reviews

Praise
“Love the keyboard and goes well with the switches i got. Size was bigger than expected but weight is truly high quality Could do with a force break mod though as it is a little pingy”
Zeke D.Verified buyer· 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 Q9 vs MMD KM40 specs

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

12 of 25 specs differ

Keychron Q9

MMD KM40

Typing & switches

Switch options

Clicky, Linear, Tactile
Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount, PCB Mount, Plate Mount
Gasket Mount

Sound dampening

Yes
Yes

Screw-in stabilizers

Yes
No

Layout

Layout size

40%
40%

Layout standard

ANSI, ISO
ANSI

Ergonomics

Split Spacebar
Standard

Knob

Yes
No

Display

None
None

Connectivity & battery

Connection

Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

1,000 Hz
—

Battery

Wired only
2,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
Aluminum

Plate material

Steel
Polycarbonate

Keycaps

PBT
PBT

Weight

1,050 g
620 g

Dimensions

20 x 94 x 326 mm
—

Typing angle

5°
—

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

Yes
Yes

VIA

Yes
Yes

Mac & Windows

Yes
No

Extras

Released

2022
2026

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

Keychron Q95 stores
  • KeychronHK

    In stock
    $59Visit
  • Input GearDE

    In stock
    $109Visit
  • MKUS

    In stock
    $119Visit
  • AmazonGlobal

    Check price
    Visit
MMD KM402 stores
  • MonacoKeysDE

    In stock
    $84Visit
  • AmazonGlobal

    Check price
    ~$84Visit

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