StarTech.com 3 Port Low Profile PCI 12V PoweredUSB Adapter Card - USB PlusPower (PCI312PUSBLP) Backwards compatible with standard USB 2.0, USB 1.1 and Powered USB peripheral devices Enables a low-cost, standard PC to become a powerful retail system 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 Backwards compatible with USB 1.1 and 2.0 standards and allow for hot-plugging