The USB 3.0 Ethernet Adapter allows a user's computer to instantly connect to a 10 / 100 / 1000 Mbps network through an existing USB port. There is no need to purchase an extra Gigabit network card that uses a PCI or CardBus slot. With compliance to USB 3.0 specification this adapter ensures true 10 / 100 / 1000 Mbps network speed without any compromise. The USB bus-powered design means external power is not required. Specification: Gigabit Ethernet port USB3 Plug and Play hot-swap Supports crossover detection and auto-correction USB bus power (no external power supply) Support O/S: up to Windows11 Mac: Mac OS X 10.6 to 10.12.5