Yes, but it can be a little confusing. Connecting a Roku device to a Roku TV is similar to connecting something like a Blu-ray player. You switch the TV's input to the Express when you want to use it and go back to the TV's Home Screen when you want to switch to a different input or antenna channels.
The Express 4k+ comes with a voice remote with TV controls, but it will only control the power and volume of the TV. You'll still need to use the TV's remote to switch inputs to something like a cable box, game console, or to use antenna channels. If you press Home on the TV's remote you'll see the TV's Home Screen and if you press Home on the Express's remote you'll see its Home Screen, so it's advisable to use a different theme on each so you can readily identify which one you're seeing.
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