Assuming this is not a Voice Remote (one with a microphone button on which you can issue commands via voice)...
Roku TVs use a different set of IR (infrared) controls than separate Roku devices do. Their remotes are not interchangeable.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X
