Keychron K5 - Disable Auto Sleep Mode; Activate Voice Assistants

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5. Disable Auto Sleep Mode
The keyboard goes to Auto Sleep Mode in 10 minutes of sitting idle to save battery.
Press fn + S + O (for 4 seconds) to disable the Auto Sleep Mode.
(If you want to go back to the Auto Sleep mode, press fn + S + O for 4 seconds again)
6. Activate Siti / Cortana
For Siri on Mac: Go to System preferences > Siri > select “Press Fn (Function) Space”
option.
*Siri key only works on MacOS and does not work in iOS.
Siri
Settings
Press Fn (Function) Space