Hawking HGA32T Gigabit NIC 10/100/1000 adapter For Gigabit Ethernet and Fast Ethernet networking environments Backward compatible with any 10/100Mbps card or switch Auto-negotiation for 10/100/1000Mbps and Half/Full duplex operation mode Diagnostic LEDs for 1000M Link, 100M Link, 10M Link, and Activity Network drivers (on included CD) for Windows 98SE, NT4.0, 2000, XP, ME, Netware 4/5/6.x, Linux and Mac OS