Forget all the hype. I was also concerned about how it works. The included booklet/instructions manual is helpful but not practical at all. I read other reviews and was immediately concerned. So I finally gave up and realized that if I just go to the basics and it doesn't work, I might as well be worried. So I just took out the power adapter, plugged it into an outlet, and then took the SD card with a couple of video clips and put it in the SD card slot on the side. (It's full-size, by the way, so if you're using SDXC, use a full-size adapter.) I put two AAA batteries in the remote and pressed the red power button on the remote in the top-left corner. (They also have a green power button in the top right corner that is used to control the TV and not turn it on or off.) I also took an HDMI cable from this MYPIN 4K media player and plugged it into one of the 1080P -HDMI slot of my monitor. When I pressed the red button a menu appeared with all sorts of options where to get the movie source or file from, settings etc etc etc. I chose "SD card" and then files came from the SD card. I scrolled down and selected one and it played well in bingo. There were no disturbances. With a little fiddling with the remote I was able to fast forward and more. Unfortunately, I used older, non-4K resolution files for this test, but here's what I found. The 4K media player will NOT get hot. At best, Luke was warm after playing a video file for a while. There are loads of ports on multiple sides of this box, a whole load of USB ports that just die for you to plug in a USB drive and play. So everything works great for me. I know I'm wasting traffic and I've had a frustrating time trying to figure out where to start looking at the user guide. Then everything got blocked as I just let common sense take over and got instant results.
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