Features: 1 upstream and 4 downstream USB port included Fully compliant with USB specification version 2.0Hot plug and play USB device Half-transparent design with red LED indicator for power Interface: USB 2.0 Compatible with USB 1.1Data transfer rate: 1.5Mbps/12 Mbps/up to 480 Mbps Bus-power limit current for protection: 500mA Material: plastic/metal. System requirement: for Windows: XP, ME, 2000,98SE, 98, Vista, 7, Win8 Macintosh: for Mac OS x 10.2Linux 2.4 later version Color Black Item size: 163*35*21mm Net weight: 79g Packing content: 1 x 7 port includes USB 2.0 Hub.