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Bitcoin mining USB devices in a row with small fans Stock Photo - Alamy
All you need to know about USB bitcoin mining! : TechMoran
Amazon.com: GekkoScience NewPac 130Gh/s+ USB Bitcoin / SHA256 Stick Miner Most Efficient, Powerful USB Miner on Market : Electronics
Amazon.com: BitcoinMerch.com - Powered 7-Port USB 3.0 Hub, Upgraded 65W Compatible with Newpac, Twopac, Moonlander, Antminer US Plug - USB Miner NOT included : Electronics