The TP-LINK TF-3239DL Fast Ethernet Adapter is a highly integrated & cost-effective Fast Ethernet Adapter that provides 32-bit performance, PCI bus controller, & full compliance with IEEE 802.3 10 Base-T, IEEE 802.3u 100 Base-TX specifications & IEEE 802.3x Full Duplex Flow. TF-3239DL keeps low cost & eliminates usage barriers. It is the easiest way to upgrade a network from 10 to 100 Mbps. Supports both 10 Mbps & 100 Mbps network speed both in Half-Duplex & Full-Duplex transfer modes, using Auto-Negotiation technology to detect the network speed. It also can be widely used in most modern Operating System. For Windows Me/2000/2003/XP integrates the right driver, TF-3239DL is really a plug-&-play device.