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The USB 3.0 Ethernet Adapter lets you add a Gigabit network port to your laptop or Ultrabook computer through a USB 3.0 port and features an integrated USB 3.0 passthrough port that keeps your USB port available for use with other peripherals. Maximum Compatibility The RJ45 port on the Ethernet dongle supports 10/100/1000 Mbps Ethernet and is fully compatible with IEEE 802.3i/u/ab standards. The USB 3.0 network adapter is the ideal laptop accessory for your Microsoft Surface Pro 4, Surface Pro 3, Surface 3, Surface Pro 2 or Surface Book. Built-in Features An ideal replacement USB LAN adapter or laptop accessory, this compact USB 3.0 NIC leverages the 5Gbps speed of USB 3.0 to provide full Gigabit bandwidth and offers backward compatibility with USB 2.0 systems (speed limited by USB bus). The USB 3.0 hub with Ethernet adapter supports features such as IPv4/IPv6 packet Checksum Offload Engine (COE) and TCP large send offload to reduce the load on your CPU. Jumbo Frames, full-duplex operation with 802.3x flow control and VLAN tagging are also supported, making this an efficient and full-featured USB 3.0 network adapter. This USB 3.0 Gigabit Ethernet adapter is backed by a StarTech.com 2-year warranty and free lifetime technical support.