Roku does customizable buttons right on the Voice Remote Pro

The buttons labeled “1” and “2” can save any voice command that Roku supports; just long-press either button after the voice command, and it’ll be set as that button’s function. This can be as simple as using them as two shortcuts for apps that don’t have their own button, like “open HBO Max” or “open Peacock.” But you can also use the shortcut buttons for searches (“show me free movies”), input selection (“switch to antenna TV”), or TV controls (“turn the volume up,” “turn on closed captioning”).

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