I purchased a Mini Logitech keyboard designed for Google TV. I was excited to try it out because of a lack of backlit keyboard on the stock remote. I connected the unifying dongle to the Vizio costar after unifying it on my computer. Worked okay for a few minutes. I noticed that when I would use the channel up and down it would continue to change channels nonstop or the up and down pad. I was able to get it to change channels with TVs & Movies out but I had to make sure that the remote was awake or not in sleep mode. Several of the keys would not work properly including the back key didn't function at all. Volume key work only on the Google TV it did not change the volume on my amplifier. So I returned it to Amazon as of today.