Features Add 10 USB 2.0 Hi-speed ports with LED indicator Full compliant with USB 2.0 specifications; Backwards compatible with USB 1.1 Support a total of up to 127 Hi-speed USB devices Support data transfer rate of 1.5/12/480 Mbps Friendly, ergonomic design, easily protection Plug-and-play installation 9+1 Hi-speed downstream ports with USB A female connectors Hi-speed upstream port with standard USB-B jack (1m cable included) Support most operating systems like Windows 98SE/ME/NT/2000/XP/Vista, Mac OS 10.2 or above, Linux 9 Built-in short circuit current overload protection device Include a 110-240V AC 50/60Hz - 5V DC 1A Power Adapter (USA/Asia Plug)* Dimensions: 190x37x21.3mm *Free european plug adapter also included in your order.