Portable 4 Port Hub USB-A to 4x USB-A SuperSpeed USB 3.0. Rocstor Premium Portable 4 Port SuperSpeed Mini USB 3.0 Hub with a built-in cable delivers up to 5Gbps transfer rates. The integrated cable design makes the mini USB hub the perfect accessory for your Mac® / PC notebook or Ultrabook computer. Designed for easy travel with a built-in cable eliminating any need for additional cables for attachment to laptops and tablets. The power will come from the attached computer, (there is no need for an external power adapter). Plug-and-Play, no drivers or software required. Works with all Windows and MAC operating systems (computer and devices must be both USB 3.0 rated to achieve maximum 5Gbps speeds). The Hub is backward compatible to USB 2.0 and 1.1, so that older USB devices can be attached (devices will run at their native speeds of 480Mbps and 12Mbps respectively). The perfect solution for home and business users who require portability, the external USB 3.0 hub is USB-powered and features a rugged, compact design with a built-in cable, so no additional cables are needed to connect the hub to your system. This 4 port mini USB hub is backed by Rocstor’s 2-year warranty and lifetime phone support.