TeckNet Aluminum USB 3.0 to RJ45 Gigabit Ethernet Adapter Supporting 10/100/1000 Mbps Ethernet USB 3.0 male A to RJ45 female adapter supporting 10/100/1000 Mbps ethernet. Adopts USB 3.0 standard. Backward compatible with 2.0/1.1 standards. Supports USB Super/High/Full Speed modes with Bus-power or Self-power device, auto-detect capability, Supports parallel detection and automatic polarity correction. Supports crossover detection and auto- correction Supports IPv4/IPv6 packet Checksum Offload Engine, Supports Jumbo frame and PHY loop-back diagnostic capability. Support Wake-on-LAN Function, Supports dynamic cable length detection and dynamic power adjustment Green Ethernet (Gigabit mode only). Supports Windows (32/64 bit) 8 / 7 / Vista / XP. Powered via USB - no external power adapter needed. LED indicators indicate operation.