2-in-One 2-in-one device uses only one USB port on your computer. Provides access to a Gigabit Ethernet Port and also adds 3 spare USB 3.0 Ports Self Powered & Driver Free Plug and play device and comes with pre-installing drivers compatible with both Windows and Mac OS. Does not need any need any software or drivers installed prior to operation. The device is also self-powered through the USB port.