I do Livestreaming and video production, brought this unit last week and I'm so thankful enough to have this in my hand for live stream wedding event that happen last week. Usually, my livestream is in line of sight for all my wireless transmitter and receiver, but last weekend we have to move from outdoor and indoor for the event. So, there were no room indoor to setup my system, we had to video switcher from outside close glass door, found out all my other transmitter couldn't get the video signal. I plug in the new 4k mars and it work perfectly fine without signal loss. from there I knew this was a keeper for my live video switcher. after get thing working. I have to move all my receiver to inside of the reception room for other camera to work. I use all kind of wireless video system and found this model is very fast when sync and pairing. The channel is very good it has the auto scan channel. I gave it 5 star Because it has a lot of improvement and quality to this model, 4k function for great cause I can now do cropping in my vmix switching during livestreaming. Wireless Signal and with New antenna are very stable for this price range compare to other video wireless company.