Insert the linking cable into the keyboard halves.
Insert the USB-C (rounded) side of the longer cable into the keyboard and the USB-A side (rectangle end) into the computer.
Firmware updates: Added lighting button lockout function via fn+windows key press
Software updates: Minor bug fixes
Firmware updates: Fixed backlight brightness issue
Firmware and software for updated C989 with aluminum dial, select all / copy / cut / paste / fn macro keys, and Kailh switches