The USB 3.0 to Gigabit Ethernet Adapter adds Gigabit Ethernet network connectivity to a laptop or desktop through a USB port. Backward compatible with USB 2.0 / 1.1 standards, the adapter is a versatile accessory for replacing a broken internal network card on either a desktop or laptop, adding a separately-routable network interface, or transferring files at superfast speed over an Ethernet port. Specifications Compatible with IEEE 802.3, IEEE 802.3u, IEEE 802.3ab Supports IEEE 802.3az (Energy Efficient Ethernet) Upstream port type: USB 3.0 type A Downstream port type: Ethernet (RJ45) System Requirements Supports Windows 2000 / XP / Vista / 7 / 8(32/64-bit), Mac OS 10.6 or higher Package Contents USB 3.0 to Gigabit Ethernet Adapter, Instruction Manual, Driver Disk for Windows and Mac