You can access and edit your device list here.
Category: pre-selected as 'Connected devices'
Press Menu on your remote control.
Select “Help” on the TV screen and press the OK button.
Go to “System Info” and press the OK button.
See Image 1 below as an example
The System Info page will give you a lot of information about your TV. The first thing listed on this screen is TVSN. This is the serial number of your TV. The model number of the TV will be listed right below the serial number.
Press Menu on the remote.
Select “System” then press the OK button.
Go to “System Information” and press the OK button.
4. Model Release Date:
Check this page to decode your Vizio TV serial number.
5. Operating System: SmartCast
Vizio Smart TVs run on SmartCast operating system.
6. OS Version:
You can find this on the same screen as the Model name.
7. OS Release Date:
This is the same as the model release date.
This is an example how the final device adding screen would look like: