The Cable Matters USB 3.1 Ethernet switch is an indispensable networking accessory that combines a USB Ethernet adapter and a Gigabit Ethernet switch into one convenient adapter; Connect a laptop or Nintendo Switch game console which lacks a physical Ethernet port to a wired network with the Gigabit USB Ethernet adapter which also functions as a 4 port gigabit switch Adapter functions as an Ethernet switch 4 port; Connect up to three additional devices to the 4 port switch; Connect the fourth Ethernet port to an RJ45 wall jack, wired router, or Ethernet router to share wired network access with up to four devices with the 4 port ethernet switch; Share Internet between computers with the Internet switch and Internet splitter