This 4 Port USB 20 Hub connects to one USB 20 port on a Mac or PC computer adding four USB 20 ports - allowing you to maximize the number of high speed USB peripherals connected to your computer The hub supports cascaded installation with other USB 20 hubs supporting up to 127 USB 20 device connections - a scalable solution for connecting multiple USB devices to a single host computerThe 4 port hub includes a power adapter but can be powered through USB bus connection to the host computer - allowing you to install the hub as needed without worrying about the availability of a power outletThe USB 20 hub offers an attractive black casing that suits any operating environment and includes a 3 feet USB 20 AB male-male cable for the connection between the hub and the host computer Features Quick easy installationCompact space saving designChoice of Bus Power andor External Power AdapterMaximum data transfer rate of up to 480 Mbps and backwards compatible with USB 11Hot Plug and Play feature allows devices to be connected or disconnected without turning off the PCComes complete with a wall-mount power adapter and a 3 ft USB 20 AB male-to-male cableConnect up to four USB devicesHot swap capabilities allow you to connect and disconnect devices without rebootingPC and Mac compatibleLightweight convenient to carryCase Colour BlackCertifications CE FCCDepth 97 cmForm Factor USB HubHeight 19 cmOperating Systems Supported Microsoft Windows 98SE ME 2000 XP 2003 and up Mac OS 86 or up (OS 1024 needed for USB 20 speeds)Product Type USB HubWeight 03 kgWidth 68 cmInterface 4 x USB 20