7 Downstream (USB 3.0 A-type) Ports and 1 Upstream port Compliant with USB version:1.1/2.0/3.0 Supports High-Speed(5G Mbps),Full-speed(480Mbps) and Low-speed(12Mbps) USB device profiles When power adaptor connected ,Per-port Over-Current detection and protection (Excluding power) When power adaptor connected, Supplies USB bus power(Excluding power) Every port with independent control switch Every port has LED power light Can be driven 500G mobile hard disk without external power supply Backflow prevention circuit design, in order to prevent electric current flow back to the device Automatic switching between self-powered and bus-powered mode Supports Plug & Play Electric current of the port reach 500Ma Connected cable length: 50cm System requirements: windows XP, vista, win7, Mac OS (10.X or above). Size: 16.5 x 3.7 x 2.2cm(L x W x H) Color:Black Package Content: 1 X Super Speed USB 3.0 Hub 1 X USB 3.0 cable