This is the second one I ordered, for an older model Vizio VOJ320F1A LCD HDTV. It will not get a "signal" to my wifi and it says it is "not supported". I contacted support who was very helpful and sent me a replacement. They said it is compatible with my TV, but it is not. I tried it on a newer model Vizio and it immediately connected to my wifi. Unfortunately, it was not the TV that I wanted Roku on. The old Roku that I had is beginning to stop connecting to certain apps like You Tube and Amazon Prime Video, so I thought this would work, now I am at a loss. I am not sure which one will work with my TV (which is working fine), so wanted to be able to watch movies on Prime Video. If anyone has suggestions on which stream player that is compatible with this particular TV, I would be grateful. I tried going into my computer to see if I could find it on the wifi search but it wasn't there. So beware, it is not compatible with all HDTV's.