Seven-Port PCI USB Card Adapter- More USB Ports for Your Computer This PCI USB card adds seven USB 2.0 ports (1 internal USB A Female, 2 internal USB motherboard header, and 4 external USB A Female) to your PCI-capable PC. 4 x 4-pin Type A Female USB 2.0 USB External. Internal/external ports: 1- USB A (4-pin) female, 2- IDC (10 pin, motherboard header) male/4- USB A (4-pin) female. Form factor: Plug-in card. Maximum data transfer rate: 480 Mbps. Dimensions: 0.8"(H) x 4.7"(W) x 4.8"(L). Operating system: Windows 8/8.1/7/Vista/XP (32/64-bit), 2000, Windows Server 2012, Mac OS 10.2.x, Linux. Host interface: PCI. Up to 500 mA of power/port. Includes PCI USB 2.0 card, driver CD, instruction manual. Certification & standards: CE, FCC, RoHS, Green compliant. Weight: 2.5 oz. Warranty: 2 years limited. Supports up to 127 USB devices (requires addition USB Hubs). Backwards compatible with USB1.1/1.0 devices. System and cable requirements: Unused PCI slot. Package contents: 1 x PCI USB 2.0 card, 1- driver CD, 1 x instruction manual. Weight: 2.5 oz. Certification and standards: Green compliant, ROHS, CE, FCC. Warranty: Limited lifetime. Add extra ports to connect your mobile device or an external hard drive without upgrading your motherboard with the seven-port PCI USB card adapter. Compatible with your Windows or Linux operating system, the adapter features three internal and four external female USB slots, giving you plenty of ports for your file transfer needs. If you have additional hubs, the adapter can handle up to 127 devices.