UNITEK USB 3.0 to Dual Gigabit Ethernet Adapter, USB 3.0 10/100/1000 Mbps RJ45 Gigabit Ethernet Converter Network Switch with Micro B Port for iMac Macbook Air Macbook Pro Microsoft Surface Pro USB 3.0 male A to RJ45 female adapter provides up to 1000Mbps superfast network speed, backwards compatibility with 10/100 Mbps Ethernet, when simple plug and play any RJ45 port. Dual Gigabit Ethernet ports through a single USB connection. With Gigabit switch chip, it makes internet connection with more computers by Daisy Chain Interconnection, helps multiple computers to enjoy the ultra-high-speed network. USB network adapter supports crossover detection, auto-correction and Wake-on-LAN (WOL). The dual RJ45 converter provides a internet sharing function, allows the shared of networking access for other devices and makes network setting up easier. Additional Micro B for power adaptor can be connected to the power and conduct network switching independently.