@Nickbarb-
The two available Roku Remotes with microphones for entering voice commands are the Voice Remote ($20) and Voice Remote Pro ($30). They are point-anywhere remotes that control via WiFi and must be paired with the Roku to be controlled. Voice Remotes will work with all Roku TVs and all Roku streaming devices from the last several years. This Voice remote page contains a chart of which Roku models support a Voice remote: https://support.roku.com/article/360010940514
I can tell my Voice Remote to go straight to a channel app, like 'load Netflix' or 'go to TCM'.
Or when in a channel that provides access to a bunch of live streaming channels, like Live TV on The Roku Channel, I can tell it to 'go to 200' or 'tune sci-fi' and the Roku will go straight to that channel.
See this Roku article re voice commands: https://support.roku.com/article/360009552694
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