StarTech.com USB 3.0 to Gigabit Ethernet NIC Network Adapter - 10/100/1000 Network Adapter - USB to Ethernet LAN Adapter - USB to RJ45 Compatible with Gigabit Ethernet networks and powered via USB for versatility and portability as an add-on or replacement Uses built-in Checksum and Large Send Offload support and Jumbo Frames, the Gigabit USB adapter helps conserve system resources Backed by a StarTech 2-year warranty and free lifetime technical support USB to RJ45 adapter supports Gigabit networking over USB 3.0 IEEE 802.3, 802.3u and 802.3ab (10BASE-T, 100BASE-TX, and 1000BASE-T) compatible Crossover Detection & Auto-Correction (Auto MDIX) IEEE 802.1Q VLAN Tagging support Powered directly from the USB ports Add Gigabit Ethernet capabilities to a desktop or laptop, without opening the computer or taking up an available expansion slot Replace a failed integrated network adapter with an external,  USB Gigabit Ethernet connection, instead of having to open a desktop or  laptop computer case Connects your laptop PC to a Gigabit network or backbone -  perfect for small or home offices, departmental network applications and  network gaming Transfer very large files over the network with access to true Gigabit speeds that USB 2.0 adapters cannot provide