If your roku accepts IR commands a cheap universal remote would work. If you have roku stick, it ony uses wifi remotes. Or very expensive universal that uses IP to communicate with roku stick.
I like the Inteset 422-3, its 4 in 1 universal remote:
https://www.amazon.com/Inteset-Universal-Backlit-Learning-Streamers/dp/B00M4I1BAY/ref=sr_1_3?crid=VU...
Edmund
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