The USB 2.0 LAN DOCK is an intelligent expansion module connecting to a PC or lantop through USB connection. LD202 is quipped with one high-speed RS-232 serial port, one printer port, one PS/2 keyboard & mouse, three downstream USB2.0 ports and one 10/100 RJ45 Ethernet port. The USB 2.0 LAN DOCK features easy connectivity for traditional serial devices, keyboards, mice and other USB devices, and provides up to 480Mbps USB2.0 High Speed capability. You can also add one extra Ethernet port to your PC or notebook in seconds.