342833 Brand new and high quality 7 Downstream(USB 3.0 A-type) Ports and 1 Upstream port Support High-Speed(5G Mbps)， Full-speed(480Mbps) and Low-speed(12Mbps) USB device profiles Over curret detection and protection， when power adapter is connected. Can automatically switch between self-powered and bus-powered mode Supports Plug & Play Each HUB has ON/OFF Switch which is easy to control. Look no further， your best choice! Color: black Material: ABS Size: about 165 x 36 x 22 mm USB cable length: about 60 cm Port: USB 3.0 Number of ports: 7 Port Transmission speed: 5Gbps Hot plug: support Supported system: Windows 2000/XP/Vista/7/8/Mac OS(10.X or above)/Linux This item is special for rapid increase 7 USB3.0 ports to your computer with the high speed USB3.0. Integrated battery charge controller circuit Note: When using the product， make sure enough power supply of computer USB port， otherwise it will cause the product no normal work. If it is connected with desktop， generally the front panel USB port is short of power supply， you can change it for back panel port. When the computer can not recognize the inserted new device， please be patient for a few seconds. If it still can not read， please connect all the devices first and then connect with the computer. 1 x 7 port HUB 1 x USB cable In original package