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The majority of "unpowered" USB hubs are designed for basic peripherals like mouse, keyboard and USB memory sticks. If you're going to run your mount, focuser and several cameras at once, a powered USB hub is practically a must-have. If you need to run an extension from the hub which is longer than 2 meters, an active USB extension is recommended. It doesn't have to expensive or fancy, but getting a powered hub will minimize the chance of mysterious device drop-outs in mid session.
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