HC12 sync word

Hello

I am planning to use the HC12 sensor to recieve data from microcontoler with built in RF module.
I would need to set preamble and sync word, but I cant find any documentation if this is possible. It would also work if I get the info what are preamble and sync word set on default and change them on transmitter side.

Thank you for the answers

Where is the link to that HC12 sensor? I can only find a wireless module with that name but no sensor.

And also post a link to that other microcontroller with the built-in RF module.