I purchased this GANA HDMI splitter for use with a Nintendo Switch and PlayStation 3 game setup. I have one available HDMI input to my television and don't want to unplug one cable, find the other, and plug it in every time I change systems, so I went with this HDMI splitter. It has two ports on one end and one port on the other. There's no power cable or anything additional. I plugged the HDMI cables from my PS3 and Switch in the ports on one side, and plugged an extra HDMI cable (which you'll need and is not included) into my television and the other splitter port. I turned the television on, and it displayed the Nintendo Switch screen. I hit the button on the splitter, and it displayed the PS3 screen. There is an illuminated number 1 or 2 on the switch that shows which input it is using. It's simple to set up and just as simple to use.
Overall, I didn't find any flaws with this product and am perfectly satisfied with it. There wasn't any degradation of audio or visual quality, and I didn't observe any additional lag while using it. I highly recommend it. 5/5 stars