Could someone explain how Roku works? Do you stream through
your Wi-Fi? Does it improve the picture like cable does? Can
you operate more than one TV with it, and if so, how? Does
the talking remote cost extra, or is it like a smart phone
with some sort of voice screen reading? Is installation
complicated? Are there tiers or levels of it like with
Anything you can tell me will be more than I know. Thanks
for any help.