Rosewill 4-Port USB 3.0 Hub with Switch On/Off (RHB-341-GREY) Standards: USB 3.0 Ports: 4 x USB 3.0 Transfer Rate: Up to 5 Gbps Operating System Supported: Windows 95/98/ME/2000/XP/Vista/7/8, Mac 8.6 or later Plug & Play Individual Switch on and off on each USB port Current Overload detection and protection design for each port