I bought this hub to expand the ports of my iMac. It offers 2 USB-C ports, 3 USB 3.0 ports, 1 HDMI port, and mini and micro SD slots. All this at a pleasantly low price. I checked the ports and SD slots - they all worked fine. HDMI was definitely the connection I wanted because it gives me the ability to both mirror my screen to the TV in the room and use the TV as a second screen for my iMac. It was easy to do. I plugged an HDMI cable into the hub's HDMI port and then into one of my TV's HDMI ports - switched the TV's input to that port and I saw my iMac's screen. Sweet. I hope this helps someone else as much as it helped me.
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