Cables Unlimited USB2.0 Minihub 4 Port USB 2.0 Mini-hub with power Supporting blistering fast data transfer rates up to 480Mbps, high-speed USB 2.0 offers increased functionality and greater compatibility with USB devices Supports high-speed data transfer rates of up to 480 Mbps, 40 times faster than USB1.0 4 downstream ports can handle high-speed(480Mbps), full-speed(12Mbps), can support up to 127 devices Win98SE/2000/XP/Vista, Mac 10+ 1-year warranty