many devices such as laptops, game consoles, and dvrs lack ethernet ports, so you lose the ability to experience speedy and stable wired network performance. the linksys usb 3.0 wired gigabit adapter (usb3gig) is an ideal solution for travellers who prefer the ultra-fast data transfer speeds that gigabit ethernet delivers, especially for large file downloads or high-bandwidth media streams. designed for easy setup, simply plug the usb3gig into your macbook air, chromebook or ultrabook via the usb 3.0 port. then connect an ethernet cable between your router and the adapter to instantly experience ultra-fast wired connectivity. its sleek, compact design makes the usb3gig easy to carry and an included travel cap keeps the ports protected.