What This Product Does The USB 3.0 to Gigabit Ethernet Adapter UE300 adds Gigabit Ethernet network connectivity to your Ultrabook, MacBook Air or desktop through a USB 3.0 port. Backward compatible with USB 2.0/1.1 standards, transferring files at ultrafast speed over an Ethernet port. High Speed Data Transfer Equipped with USB 3.0 ports and Gigabit Ethernet port, UE300 provides a high speed data transfer rate. Connect to Gigabit Ethernet Network UE300 adds your devices connectivity to Gigabit Ethernet network. Compact and Portable Design Compact design with a retractable cable makes it an ideal on the go.