KeebFinder
Not sure which keyboard to choose? Try the Keyboard Finder now!

Head to head · Prices checked Nov 11, 2026

Zuoya GMK108 vs MMD KM40

Get the Zuoya GMK108 for the 4,000 mAh battery and knob.

KeebFinder may earn a commission when you buy through these links, at no extra cost to you.

Quick verdict

Which one should you get?

Get the

Zuoya GMK108

Battery

Build quality in the top 15% of 100% boards under $100.

Rules this board out

  • South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
$80 at ktechs

Get the

MMD KM40

Build quality in the top 10% of 40% boards under $150.

Rules this board out

  • Compact layout only. No function row, dedicated arrow keys, or numpad.
$84 at MonacoKeys

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.

Zuoya GMK108

MMD KM40

  • Layout size

    100%

    40%

  • Battery

    4,000 mAh

    2,000 mAh

    A larger battery means fewer cables during the day

  • Case material

    ABS

    Aluminum

  • Knob

    Yes

    No

  • Display

    LCD

    None

    A case display rather than a typing feature

KeebFinder scores

How we score
  • Zuoya GMK108
  • MMD KM40
Performance
82
60
Build quality
77
82
Productivity
70
69
Customizability
87
83
Portability
51
84

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Mount style: Gasket Mount
  • VIA
  • Plate material: Polycarbonate
See every spec side by side

Full specs

Zuoya GMK108 vs MMD KM40 specs

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

12 of 22 specs differ

Zuoya GMK108

MMD KM40

Typing & switches

Switch options

—
Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

No
Yes

Layout

Layout size

100%
40%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
No

Display

LCD
None

Connectivity & battery

Connection

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

Battery

4,000 mAhBetter
2,000 mAh

USB-C

No
Yes

Build & materials

Case material

ABS
Aluminum

Plate material

Polycarbonate
Polycarbonate

Keycaps

—
PBT

Weight

—
620 g

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

No
Yes

VIA

Yes
Yes

N-key rollover

Yes
No

Mac & Windows

Yes
No

Extras

Released

2025
2026

Where to buy

Compare prices

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

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.

Zuoya GMK1082 stores
MMD KM402 stores

Keep exploring

Not sold on either?

Still torn?

Answer a few quick questions and the keyboard finder ranks 2,000+ boards by how you will actually use yours.

Find my keyboardBrowse all keyboards