Adds 5 Gigabit Ethernet Connectivity- Adds a multi-Gigabit Ethernet (RJ45) port to your computer. Supports NBASE-T Standard- 5 Gb/s and 2.5 Gb/s speeds supported when used with a multi-Gigabit switch or router. Also supports 1 Gb/s and 100 Mb/s speeds. Broad Computer Compatibility- Connects to any USB-A (1), USB-C, or Thunderbolt 3 computer port, or at the end of a Thunderbolt 3 device daisy chain. Small and Silent- Adapter is pocketable and uses no fan, perfect for use in noise-sensitive environments. 2-year warranty and free lifetime technical support since 1986