The D-Link DFE-690TXD is a 10/100Mbps Fast Ethernet 32-bit CardBus adapter for notebooks. With the built-in connector, a RJ-45 LAN cable can be directly plugged into a notebook computer. The DFE-690TXD provides instant connectivity for mobile users. Enabling easy access to a network - users can access databases and resources in diverse environments. The DFE-690TXD adheres to IEEE 802.3 and IEEE 802.3u standards, which specify existing 10BASE-T and 100BASE-TX Ethernet technology supporting both half and full duplex modes with data rates up to 10/100Mbps and 20/200Mbps. The DFE-690TXD also utilizes auto-negotiation to adjust the speed to any 10BASE-T or 100BASE-TX network automatically.