I have recently bought a U9 that was packaged with the A3 remote. The keyboard works well .. although I also have a wireless full size keyboard and remote so that is not a big deal. The flyover mouse is very handy.
What seems impossible for me to get to work is the voice control. I use Siri regularly, I have a Roku Ultra with voice, and my son's LG television uses Google Assistant with a voice remote control, so I have a pretty good sense of how responsive (and how accurate) these tools should be.
In my case, I will get the prompt on my screen telling me to give the assistant commands, but it never "hears" them. I do have audio input set to use the remote.
Am I missing something, or does this sound like my A3 is defective?