MMD KM40
MMDReleased 2026
KM40
81/100
40% ANSIHot-swappableHall-effectQMK / VIARGB backlightWireless
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Why we rate it
- Class-leading portability (84/100)
- Class-leading customisability (84/100)
- Hot-swappable switches
- First-class QMK / VIA firmware
- Performance is the weak point (61/100)
Score profile
Six weighted axes · the shape tells the storyWhere the KM40 wins and loses
Full specification
Grouped · supported features marked in blueSpecifications
Layout
Layout size40
StandardANSI
ProfileNormal
ErgonomicsNormal
Volume knobYes
OLED / LCD screenYes
Switches & feel
Switch typesLinear · Tactile
Hot-swappableYes
Mount typeGasket Mount
Screw-in stabilisersYes
Sound dampeningYes
Hall-effect / magneticYes
Rapid triggerYes
Connectivity & firmware
ConnectionWireless + wired
USB-CYes
Battery2000 mAh
N-key rolloverYes
QMKYes
VIAYes
VIALYes
Mac & WindowsYes
Multi-media keysYes
Build
Case materialAluminum
Keycap materialPBT
BacklightRGB
ColourwaysYes
Weight620 g
More specs
Passthrough UsbYes
Head to head
Highlighted cell = better in that rowKM40 vs Ajazz Ajazz AK820 Pro
KM40Ajazz AK820 Pro
| MMDKM40This page | AjazzAjazz AK820 Pro | |
|---|---|---|
| Overall score | 81 /100 | 81 /100 |
| Build quality | 83 /100Better | 72 /100 |
| Performance | 61 /100 | 62 /100Better |
| Connection | Wireless + wired | Wireless + wired |
| Polling rate | — | — |
| Mount type | Gasket Mount | Gasket Mount |
| Case material | Aluminum | ABS · Aluminum |
| Hot-swappable | Yes | Yes |
| QMK / VIA | Yes | Yes |
