StarTech.com 3 Port PCI 12V Powered USB Adapter Card - USB PlusPower (PCI312PUSB) Enables a low-cost, standard PC to become a powerful retail system Backwards compatible with standard USB 2.0, USB 1.1 and Powered USB peripheral devices Supports up to 127 devices Connector locking mechanism prevents cables from being unplugged accidentally 3 external 12V Powered USB Connectors Powered from either the PCI slot or the Power Supply of the P.C. with a standard LP4 connection Supplies power and data signals over hot-plugging USB cable