Sony X85K Getting Started page 20

2 Speak into the microphone while pressing and holding the Google Assistant
button.
Speech examples may be displayed depending on your model.
Search results are displayed when you speak into the microphone.
Hint
If you press the Google Assistant or MIC button on the remote control and say
"Voice hints", information about how to speak and available voice commands will be
displayed. This function may not be available depending on your
model/region/country/language.
Note
An Internet connection is required to use voice search.
The type of remote control supplied with the TV, and the availability of a remote
control with a built-in microphone varies depending on your model/region/country. An
optional remote control is available in some models/regions/countries.
To use the microphone on the remote control, you must add and set a Google
Account to the TV.
[12] Searching for content/operating the TV with your voice | Searching for
content/operating the TV with your voice
Using the built-in MIC on the TV (only TVs with a
built-in MIC)
The built-in MIC on the TV may not be available depending on your
region/country/language.