I was gifted this keyboard and decided to write a proper English User Guide as a contribution back to the community for the blessing. I believe many people are still using this keyboard even though it’s rather old, and the only other English user guide that exists is poorly translated from Chinese.

Tested with firmware 1.40.00.

Bluetooth/setup mode

Enter setup mode by pressing FN+B. Pressing ESC or FN+B again exits the mode.

When in setup mode, the keys 1, 2, 3, 4, A, B, 0, – and + are lit.

Once in setup mode, press the following to configure specific settings:

  • “+” – Enable bluetooth broadcast
  • “-” – Disable bluetooth (radio off)
  • FN+1, 2, 3 or 4 – Save current connection to a profile (1 thru 4) – bluetooth must be connected to device before saving
    • Red = no device saved
    • Yellow = device saved
    • Green = current connected device
  • 1, 2, 3 or 4 – Quick switch to a saved profile
  • FN+0 – Switch between Bluetooth Low Energy (BLE) mode and normal mode
    • Green – BLE mode (discovered device name contains “L0”)
    • Yellow – Normal mode (discovered device name contains “L1”)
    • Takes about a second or two to switch after you press the key
  • A – Enable/disable backlight auto-sleep (new in 1.40.00)
    • Green = Auto-sleep on (backlight will switch off after 1 minute)
    • Red = Auto-sleep off (backlight will not switch off)

Switching layouts

The keyboard has four different layouts:

  • Windows
  • Windows with ALT/FN/Menu/? keys as arrows
  • Mac (Alt and Win swapped)
  • Not sure (undocumented)

How to switch modes:

  • Press L CTRL + R CTRL
  • Release either one CTRL while still holding the other down
  • Tap the released CTRL key to cycle through the modes

You will see the numbers 1, 2, 3, 4 light up in green indicating the current layout mode.

FN mode lock

To activate FN lock:

  • Press ALT+ALT
  • Press ALT+ALT again to revert to normal mode

There are no visual indicators to tell if you are in FN lock.

Backlight modes

Various backlight options are controlled through four function toggles:

  • FN+R – Turn off/on backlight
  • FN+T – Rate/speed change (for animated modes)
  • FN+Y – Backlight brightness (10 levels)
  • FN+U – Cycle through different backlight modes

Available modes:

  • Static red
  • Static yellow
  • Static green
  • Static cyan
  • Static blue
  • Static purple
  • Static pink
  • Static orange
  • Static white
  • Static blue/white/red (France flag)
  • Static green/white/red (Italy flag)
  • Static cyan with white middle row (row 3)
  • Animated pulsing colour cycle
  • Animated rainbow scrolling/marquee
  • Random colour on keypress (fades away)
  • Random colour on keypress (remains lit)
  • Animated light spread on keypress
  • Animated random colour on keys

Win key disable

To disable the Win key (or Command key in Mac mode):

  • FN+WIN – Disable the WIN key
  • FN+WIN again to enable

There’s no visual indicator on whether the key is locked or not. In Mac mode, FN+ALT locks the command key.

DFU mode

DFU mode is required for upgrading firmware.

To enter DFU mode:

  • Unplug the USB cable
  • Hold ESC while poking the reset button behind the keyboard
  • Connect the USB cable

These instructions are also posted as a README in GitHub:
https://github.com/detach8/obins-anne-pro-user-guide/tree/master