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Features: Adds 4 USB 3.0 Super Speed (5Gbps) ports Fully backwards compliant with USB2.0 / USB1.1/ USB1.0 Specification Supports up to 127 Hi-speed devices Supports data transfer rate at 1.5/12/480/ mbps Individual Port Over-Current Protection Friendly & Strong design, easily potable Provide up to 900mA per port sufficient for diverse devices 4 LED indicators for Data/ 1 LED indicator for Power Power adapter (5V/4A output) Plug-and-play installation Support Windows XP, Vista, WIN7 WIN8 Supports Macintosh OS 9.0.x only in System with USB2.0 interface One high-speed upstream port with mini USB Micro B 9pin jack