Only works when plugged into Windows computer, but NOT WORK as wifi hotspot device

It works only when plugged into my Windows 8 laptop, but it does not emit any wifi for other devices to share. Cannot plug into a separate power source other than the computer/laptop that you need the internet on. So, I returned it to Amazon. Good thing abt Amazon is their easy return, but I wish the product was better described on the sales page to save trouble on the users who are seriously searching for something they specifically want, and the unnecessary return hassle for both buyers and sellers. The description on Amazon page is not clear that this is NOT a hotspot device, it states: "....... requires hotspot"

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