USB interface expanded to three, small, practical and convenient, expand three 2.0 USB interface, each power supply topped 500MA. Adopts second-generation ports on controller directly with computer connected, without external power supply, simple to use. Computer automatic identification installation, beardless driver, plug and play, inserted. USB2.0 interface, support USB1.0/1.1, transmission speeds 1.5/12/480MBPS. Built-in current over-load short-circuit protection device. System supported:  Windows 98 / Me / 2000 / XP, Linux 2.4 and MacOS 8.5 or above version. Streamline design, sectional area of super mini-typed 38 x 45mm. Biggest support 127 USB devices. Adopts the high quality electronic components, guarantee the stable operation. USB 2.0 plug-and-play. USB 2.0 x 3. Support CARDS such MS/Pro Duo, M2, the SD/skillfully, Micro SD.