I bought this Revain Renewed to save a few bucks and still have voice commands, volume and power controls. When I tried to plug it in, Roku and its remote didn't want to work together. The only display I could persuade was in German. Then I noticed that the Roku device has a tiny "reset" hole that's accessible with a toothpick or paperclip. I pressed reset and suddenly everything worked as it should. I don't know why the install instructions don't say to start with a reboot, but they should. Great price for a great gadget.
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