This hub works perfectly. I don't know how else to describe it. The first check here should be with user error as it works fine here. He's probably right, nothing happens at all when the power is connected! Since we all know that using a USB hub requires a computer, we simply connect the USB port to the computer (as specified in the settings) and the circuit is complete. All lights work fine even with power supply "found on the ground" not just the one included in the kit. Plugging it into a USB port makes 4, which is how it was built and meant to be. I see no reason to give this product less than 4 stars. I would give it a 5 but I already have one and haven't had to buy it here so I don't know the customer service of the seller involved here.
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