Weiwell USB 3.0 4-Port HUB with on/off switch (Bus-Powered, Built-in 1ft USB 3.0 Cable) 4 x Super-speed USB 3.0 ports, each provides 10 x faster speed than USB 2.0 Compact size and portable, ideal for laptop, ultrabook and tablet PC. Also works with USB extension cable and backwards compatible with USB 2.0/1.1 devices Parallel vertical layout to allow large card readers and devices with extra width Plug and play, no driver required, works with Windows XP/Vista/7/8. Mac OS X or above. Linux 3.0 or above. NOT support Windows 8.1. Supports hot-swap Package Content:USB3.0 hub (Black) and a special gift.