uxcell Purple Heart Shaped 4 Port USB 2.0 Hub for Computer PC Computer USB Hub features 1 upstream and 4 dowstream USB ports; Fully compliant with USB specification version 2.0. Backward compatible with USB 1.1; Data transfer rate is up to 480Mbps; Individual port over-current protection. Hot swappable,This PC USB 4 Port Hub is powered by USB port, no external power needed. Unique design Heart USB Hub enables you to add multiple high-performance USB 2.0 peripheral devices to your PC. System Requirement: Windows 2000, ME, XP, and Vista; Package Included:1 x 4 Port USB 2.0 Hub