Review on Wireless HDMI Transmitter and Receiver Kit - HDMI WiFi Adapter for 1080P Mobile Screen Mirroring. Stream 4k@30Hz Video/Audio and Office Files from Laptop, PC, Smartphone, TV, or Projector. by Ronnie Dunn

It works great. Placed the receiver on top of my TV in the garage and it mirrored perfectly. The sound and picture are great as if the source is connected to the target TV. Just small and occasional flashes but it works as advertised. As soon as I turned the receiver off and then back on, it had trouble pairing with the transmitter. I followed the re-pairing instructions and it didn't work. It finally worked when I unplugged the USB power from the transmitter and plugged it back in. So if you have this problem, try this troubleshooting step. I'm impressed with this thing, it worked through walls and a few hundred yards away.