What is the purpose of the power cable that comes with Targus 4-port USB 2.0 hub?

What is the purpose of the power cable that comes with Targus 4-port USB 2.0 hub?
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1 Answer

Answer :

Some devices are low power, and some are high power and will need the power provided by that AC cable. If everything works, it’s likely that all your devices are low power. If down the road you plug a device in and it doesn’t seem to work, try using that power cable.
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