Keyboards

mki0002ozlet cool640db

A 40-key split ortholinear wireless DIY keyboard kit running ZMK, with a trackball on each half.

Some specs could not be matched to a source · Last verified: 2026-10-17

~¥27,000

Where to buy

No US retailer found yet. Official site

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Pros

  • Trackballs on both halves
  • Bluetooth wireless, powered by four AAA batteries
  • ZMK firmware allows keymap editing
  • Available as assembled set or PCB set

Cons

  • Switches, keycaps and batteries must be supplied separately
  • PCB set requires sourcing the remaining parts yourself
  • Assembled set may be out of stock

Specs

SplitSplit
StaggerOrtholinear
TentingNone
KeywellNo
Thumb clusterNo
Keys40
LayoutsCustom
SwitchesMechanical
Hot-swapNo
FirmwareZMK
DIY kitYes
ConnectivityBluetooth
OSwindows, macos, linux, ios, android
Released2025
Sources
AD · detail-mid

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