Add Gigabit Ethernet connectivity & 3 USB (Universal Serial Bus) 3.0 Hub ports to a computer through a single Super Speed USB (Universal Serial Bus) 3.0 port. The ST3300U3S USB (Universal Serial Bus) 3.0 Gigabit Network Adapter turns a single Super Speed USB (Universal Serial Bus) 3.0 host connection port into an RJ45 Gigabit network port as well as three additional USB (Universal Serial Bus) 3.0 ports. Unlike with a USB (Universal Serial Bus) 2.0-based adapter, this USB (Universal Serial Bus) 3.0-based NIC lets you connect to your home or office network at full Gigabit bandwidth, with support for 10/100/1000 Mbps. Plus, with support for features such as Jumbo Frames, VLAN tagging & Wake on LAN (WOL), this versatile network adapter offers a comprehensive Gigabit network solution. The adapter features three USB (Universal Serial Bus) 3.0 connection ports, which not only replaces the host USB (Universal Serial Bus) 3.0 port required for connecting the Gigabit adapter, but also provides two additional USB (Universal Serial Bus) 3.0 ports which can be used as a hub for connecting/charging multiple mobile devices (e.g. Apple® & Android devices). Backward compatible with USB (Universal Serial Bus) 2.0 & USB (Universal Serial Bus) 1.x standards, the Gigabit Adapter/USB 3.0 hub will still support older USB (Universal Serial Bus) devices & can also be used with an older system that does not have USB (Universal Serial Bus) 3.0 ports (network speed limited by USB (Universal Serial Bus) 1.x/2.0 bus), allowing you to mix & match USB (Universal Serial Bus) 3.0/2.0/1.x devices. For further portability, the adapters can be used with or without the included external power adapter, eliminating the hassle of having to find an available wall outlet. The ST3300U3S is backed by a Star Tech.com 2-year warranty & free lifetime technical support.