Review on 🔌 Sabrent 4 Port Portable USB 3.0 Hub with Power Switch - Ideal for Ultra Books, MacBook Air, Windows 8 Tablet PC - Black (HB-U3P4) by Michael Barry

I received another Sabrent 4-port USB 3.0 Portable Hub with power switch this week. I ordered it in November 2015 and it has been working flawlessly ever since. I needed more connectors to connect, so I ordered another one. My latest Sabrent 4-port portable USB 3.0 hub with power switch also works great and I don't see any problems with it in the future. I snapped some pictures of my Sabrent 4-Port USB 3.0 Portable Hub with the power buttons together to show what interests me. The newest one has a hole in the side and I don't know why it's there. Could it be the power supply? I have not received instructions for my hub for information. I recommend this USB hub. The convenient port layout makes it very easy to connect and remove USB sticks, cables, etc. I plan to order another one of these.