adds 4 usb ports a type up to 400ma automatic current sharing by devices request 1 usb a male connector supports both full speed 12mbps and low speed 1,5 mbps transfer rates. over current protection chains up to 127 usb devices truly plug and play automatic system configuration windows 98/2000 drivers automatic installation usb and acpi compliant net 40g dimensions l 95 h 18mm.