Startechcom usb 30 to gigabit ethernet adaptors startechcom usb31000s the usb31000s usb 30 to gigabit ethernet adaptor from startechcom adds a single rj45 ethernet port to a usb enabled computer system with support for gigabit network connections at full bandwidth unlike usb 20 adaptorsthis compact usb 30 network adaptor is backward compatible with older usb 201x computer systems speed limited by usb bus making it the ideal portable replacement network adaptor or laptop access