TeckNet USB 2.0 to 10/100 Ethernet LAN Wired Network Adapter, USB to RJ45, LED Indicator Single chip USB 2.0 to 10/100 Mbps Ethernet Controller, compliant with USB2.0/ 2.0/ 1.1 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, automatically saves power when Ethernet cable is unplugged