I have had this item for a year now. I've used it with a laptop and a desktop computer. I've used it with and without the power cord that came with it. I like the flexibility of using it powered or unpowered, with or without the included USB extender (so it's not sticking right out of your computer for someone/something to swipe it off the side). It helps me turn my computers into a full retail store. Point of sale systems with credit card and barcode readers, receipt and bill printers and cash drawers all connected via USB :)
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