USB 3.0 4 Ports HubU-540 Specification: 4 downstream and 1 upstream ports Compliant with Universal Serial Bus 3.0 specifications Supports simultaneous operation of multiple USB 3.0, USB 2.0 and USB 1.1 devices Up to 5Gbps data transfer rate Hot-swapping feature allows you to connect/disconnect devices without powering down the system No device drivers required for Hub installation LED to indicate Hub power System Requirements: Windows® XP/Vista/7 (32/64 bit) Available USB port