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Purple aluminium keyboard kit with hot-swappable PCB, Type-C and Bluetooth 4.0

Corn Electronics

Corn Electronics GK21S Purple Gaming Keyboard Kit

SKU CH-V9QN-EMNN1

A compact 21-key mechanical numpad kit with hot-swappable Kailh sockets, per-key RGB, Bluetooth 4.0 and USB-C, plus a 750 mAh battery rated for over a month of typical use

  • Key SwitchNo
  • Keyboard ColorPurple

Key Switch Type No

Keyboard Color Purple

  • 32-bit MCU and 8M Flash enable fast custom macro programming
  • Bluetooth 4.0 plus Type-C USB give dual-mode wired or wireless freedom
  • Hot-pluggable Kailh connector lets you swap MX-style switches without soldering
  • 8 million colour anti-RGB LEDs with music rhythm and sound control effects
  • 750 mAh battery runs over one month at four hours daily use

Prismatic Aluminum Kit

The Corn Electronics GK21S arrives as a purple aluminum kit with a hot-swappable PCB, 32 bit MCU and 8M flash. It connects through Type-C USB or Bluetooth 4.0 and drives 16.8 million colours via three 256 LED driver chips. The board supports music rhythm lighting, per-key macro programming across three layers and plate-mount stabilisers.

DIY Switch Enthusiasts

Builders who want to choose their own MX-compatible switches will appreciate the Kailh hot-swap sockets that accept three or five-pin Cherry, BOX or Gateron stems. Users who need a complete, ready-to-type keyboard with switches and keycaps included should look elsewhere, as the kit contains neither. The 750 mAh battery is rated for over one month at four hours daily use without backlight.

Programmable Lighting & Layout

On-board firmware enables custom macro layers and sound-reactive effects without external software dependencies. The anti-RGB LED orientation shines through switch housings for even glow regardless of stem type. No keycaps, switches, stabilisers or carrying case are bundled, so buyers must source those separately to finish the build.

Highlights

  • 32-bit MCU and 8M Flash enable fast custom macro programming
  • Bluetooth 4.0 plus Type-C USB give dual-mode wired or wireless freedom
  • Hot-pluggable Kailh connector lets you swap MX-style switches without soldering
  • 8 million colour anti-RGB LEDs with music rhythm and sound control effects
  • 750 mAh battery runs over one month at four hours daily use

Specifications

Key SwitchNo
Keyboard ColorPurple

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Questions about this item

Which mechanical switches do I need to buy separately for the GK21S Purple kit?

The PCB accepts any three-pin or five-pin MX-style switch such as Cherry, BOX or Gateron; the hot-pluggable Kailh connector lets you install them without soldering.

Can I keep my current USB-A charger and still use the wired mode on this keyboard?

Yes — the kit includes a Type-C USB cable, so you only need a standard USB-A port or adapter to power and connect the board in wired mode.

How do I confirm the per-key RGB lighting is functioning correctly after assembly?

The 16.8 million colour driver supports music rhythm and sound control modes; if the LEDs react to audio or your custom macros, the lighting system is working as intended.

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