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 ieee 8023iuab standards this 2 port usb lan adapter is a versatile solution for connecting to two separate physical ne