ATOLLA USB 3.0 7 Ports Super Speed USB Hub + 1 Charging Port with Switch (Black) USB 3.0 7 ports super speed hub for computer/notebook With an intelligent charging port, built in intelligent charging (2A/1A) auto switch chip Each port correspond an electronic switch Electronic switch: Press it shortly to turn on, Press it more one second to turn off Support usb 3.0 super speed(5Gbps) transmission, downward compatible USB 2.0/1.1. Drive free, spports windows xp/vista/7/8 and mac OS(10.x and above), linux