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

Head to head · Prices checked Oct 23, 2026

Ajazz AC100 vs MMD KM40

Get the Ajazz AC100 for the 8,000 mAh battery.

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.

Ajazz AC100

MMD KM40

  • Layout size

    96%

    40%

  • Battery

    8,000 mAh

    2,000 mAh

  • Switch options

    Linear

    Linear, Tactile

  • Display

    TFT

    None

  • Weight

    2,100 g

    620 g

KeebFinder scores

How we score
  • Ajazz AC100
  • MMD KM40
Performance
58
61
Build quality
60
83
Productivity
65
69
Customizability
65
84
Portability
62
84

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Case material: Aluminum
  • Mount style: Gasket Mount
  • Keycaps: PBT
See every spec side by side

From real owners

What owners say

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

Ajazz AC100

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

Ajazz AC100 vs MMD KM40 specs

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

13 of 22 specs differ

Ajazz AC100

MMD KM40

Typing & switches

Switch options

Linear
Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

No
Yes

Layout

Layout size

96%
40%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Display

TFT
None

Connectivity & battery

Connection

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

Battery

8,000 mAhBetter
2,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
Aluminum

Plate material

FR4, Plastic
Polycarbonate

Keycaps

PBT
PBT

Weight

2,100 g
620 g

Dimensions

20 x 145 x 410 mm
—

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

Yes
No

Mac & Windows

Yes
No

Extras

Released

2024
2026

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

Ajazz AC1003 stores
  • MechkeysCN

    In stock
    $89Visit
  • AmazonGlobal

    Check price
    ~$89Visit
  • WhatGeekCN

    Out of stock
    $149Visit
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.

Still torn?

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