The Gigabit USB 3.0 Ethernet adapter converts a USB port into a 10/100/1000 Base-T Ethernet port. It enables low-cost and affordable Gigabit Ethernet network connection to any PC laptop or embedded system by using your existing USB ports. With the addition of three USB 3.0 ports this allows you to connect USB devices such as keyboards mice flash drives etc. Specification: Supports USB3.0 super speed (5Gbps) transmission downward compatible USB2.0 Supports to connect three USB devices simultaneously Supports OS: Windows up to Windows10 Mac OS X v10.8 Max 900mA per port Supports 10/100 /1000Mbps bandwidth Supports twisted pair crossover detection and auto-correction