GeekStar GKG108-MK921 keyboard software
Remap keys, set the RGB, record macros and change device settings on the GeekStar GKG108-MK921. Free and open source. Use it in a Chromium browser with nothing to install, or download the desktop app for Windows, macOS or Linux. Either way it runs entirely on your own machine: no account, and the browser version makes no network requests once the page has loaded.
What sharkfin does with the GKG108-MK921
- Remap any key. Click a key on a picture of the board and give it another key, a mouse button, cursor movement, the scroll wheel, a macro or a media control. Base and Fn layers both. 2 onboard profiles.
- Lighting. 18 backlight effects with direction options, full RGB colour, brightness and speed, changing live as you drag.
- Per-key colour. Paint individual keys and send the pattern to the board's flash.
- Macros. Record key and mouse sequences with per-event delays into the 50 onboard slots, then bind a key to one.
- Debounce. Adjustable, 1 to 10.
- Sleep timers for 2.4 GHz and Bluetooth, plus deep sleep.
- Edge light. This board has edge LEDs, so their own effect, colour, brightness and speed get their own controls.
- Backup. Export everything to a file and restore it later.
sharkfin draws the GKG108-MK921 key by key, so you remap on a picture of your own board.
GKG108-MK921 at a glance
| Brand | GeekStar |
| Model | GKG108-MK921 |
| USB ID | 3151:5002 |
| Device ID | 3186 |
| Protocol family | gen2 |
| Settings writable | yes |
| Drawn layout | yes |
| Onboard profiles | 2 |
Connecting
Plug the GKG108-MK921 in with a USB cable. There is no configuration channel over 2.4 GHz or Bluetooth on this hardware, so a receiver or a Bluetooth pairing will not do. Settings are stored on the keyboard itself, so everything you change keeps working wirelessly once you unplug. sharkfin never flashes firmware, so there is nothing here that can brick the board. On Linux, both the browser and the app need a one-line udev rule before they can open the keyboard.