Directly connected with the computer no external power supply easy to use; Adopt the second generation of USB HUB controller support plug and play and the hot swap function; USB 2.0 interface support USB 1.0 / 1.1 / 2.0 transmission rate of 480MBPS; Built in short circuit and overload protection device; Plug and play suitable for notebook computer PDA all kinds of small and portable type PC; System support: Win 95 / 98 / Me / 2000 / XP Linux 2.4 and Mac os 8.5 or later; Streamline ultra micro design; The use of high-quality electronic components to ensure stable operation; Modeling and good portability.