The Diamond USB303HE 3-port SuperSpeed USB 3.0 Hub with 10/100/1000Mbps Gigabit Ethernet Port, Mini Docking Station for Ultrabooks, Laptops, PCs, and Mac. ASIX AX88179 Chipset, USB to RJ45 offers a wide array of features including IPv4/IPv6 checksum offload engine, crossover detection and auto-correction, TCP large send offload and IEEE802.3az EEE (Energy Efficient Ethernet) that allows to enter a low power idle state to reduce power and to achieve a more energy efficient Ethernet. It supports dynamic cable length detection and dynamic power adjustment Green Ethernet in Gigabit mode.