Kinivo UHB-304 Hi Speed 4-port USB 3.0 Hub with Power Adapter 4 USB 3.0 ports for easy expansion Supports data transfer rate of up to 5 Gbps Plug and play, hot swappable and portable Backward compatible with USB 2.0/ 1.1 specifications Supports Windows98, 98SE, ME, XP, Vista, 7 and Mac OS X