4-port USB 2.0 hub with a port on each end of the cables, 4 x USB A jack, 1 x USB A plug, Including DC-Jack for optional power supply, Compliant with USB 2.0 specifications, Supports data transfer rates up to 480Mbps, Plug and Play and hot-swappable, Overvoltage protection on each output, Ready to connect with built-in USB connection cable, Connection cable length 100cm, Supports Windows 7, Vista, XP and Mac OS 10.x