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I bought this to use with some Astronomy equipment via a laptop PC. The first one lasted only four nights before packing up. I requested a replacement which duly arrived. But that one only lasted three hours. This time it was connected to my PC in my control room. Both the hubs were mains powered.
Each time I was able to trace the fault to the supplied 5v power supply. I have two industrial USB hubs from Star Tech. So I was a little surprised to have two hubs from them, that were faulty.