To the point...yes, it's what you need, what you're looking for to build up or enhance that home theater of yours. I use it for mine. Yes, it does transfer 4K flawlessly! All other reviews are accurate and dead-on. I would buy more of these HDMI couplers again. This coupler is durable and great quality with a nice flush fit for your HDMI cord male ends. I'll definitely buy more here again if/when needed.