Sony KDL-50W706B Manual page 131

This option may support more devices than other options.
[Auto (5GHz Band)]: Use this option when connecting with devices that support 5GHz. This option
may improve video streaming quality.
Note that when you select this option, the TV cannot connect with devices that support 2.4GHz
only (except for the standby screen for Screen mirroring).
[Select a Channel]: Use this option to select a specific wireless channel.
Note that when your TV is connected to a wireless router (access point), [Band Setting] cannot be
changed.
Tips
For information about the supported wireless band of your device, refer to the
instruction manual of your device.
The 5GHz band may not be supported depending on your region/country. If the
5GHz band is not supported, you can only use [Auto] and [Select a Channel].
A different band might be used depending on the connected wireless device.
Notes
While the standby screen for the Screen mirroring is displayed, the wireless connection
between the TV and your wireless router (access point) is disconnected, therefore
communication via the Internet (such as an incoming call) is stopped.
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