High-Speed USB 2.0 Notebook Card, with Two 480MBps Ports / Increase performance by adding two powerful USB 2.0 ports. Instantly connect next generation devices including scanners, printers, high-speed storage devices, and video cameras. Backward compatibility with USB 1.1 devices ensures compatibility with older peripherals, too. Daisy-chain up to as many as 127 USB 1.1 and 2.0 devices to your laptop by linking the card with a USB 2.0 hub (sold separately). Quick and easy installationjust drop in. Connects Devices (From/To): Laptop to USB 1.1 and 2.0; Connector/Port: 2 USB 2.0; Transfer Rate: 480MBps; Operating System Compatibility: NA.