The DualRole is a perfect companion for MacBook users who need additional USB 3.0 ports for instant connection to peripherals and to connect to a secure wired network using Gigabit Ethernet simultaneously. DualRole lets you connect and expand various USB peripherals with up to 3-additional USB 3 SuperSpeed ports. Ideal for travel and road warriors. Expand and connect more peripherals with 3 additional USB 3.0 SuperSpeed ports. Turn 1 port into 3 when you need it most during your travels. DualRole is the perfect tool for the new laptop/tablet hybrids like the Lenovo ThinkPad XI Carbon or Windows Surface Pro. Simply plug DualRole into the USB port to instantly add a Gigabit Ethernet port and three more USB 3.0 ports. Drivers installation required for Gigabit Ethernet.