Add two gigabit ethernet ports and a usb 30 pass through port to your laptop through a single usb 30 port the usb32000spt usb 30 to dual port gigabit ethernet adapter lets you add two gigabit ethernet ports to your laptop or ultrabook computer through a single usb 30 port and features an integrated usb 30 pass through port that keeps your usb port available for use with external storage or other peripherals each rj45 port supports 101001000 mbps ethernet and is fully compatible with ie