This official Roku branded remote works just like the one that came with your unit. It has the TV controls on it (on/off, vol up/down, and mute). It does not have the wireless sound (where you can plug earbuds into the remote). It does have "voice control", which honestly I personally just never can get any satisfactory results from. This remote does use the RF mode (vs the infrared) for the Roku control, so you don't have to point the remote at the unit if your unit supports the RFs remotes.
The one thing I want to point out is that some of the buttons, particularly the up/down/left/right pad, are not as sensitive as the original remote, requiring significantly more force on each direction to register a button bush. The first remote I received had really poor sensitivity on the "up" and "left", so I returned it. The replacement remote is better, but still requires more force on these buttons than my original remotes.