The D-Link DCF-650W is a wireless compact flash type II card that is IEEE 802.11b compliant. The DCF-650W provides a solution to connect PDAs (Personal Digital Assistants) such as the Compaq iPAQ and Casio 125 to an existing IEEE 802.11b wireless network. The DCF-650W operates in the 2.4GHz frequency range and utilizes Direct Sequence Spread Spectrum (DSSS). The DCF-650W is targeted at users with PDAs, that want the convenience offered by connecting to an existing wireless local area network without wires.

The DCF-650W will operate in either Ad-Hoc mode (networking without an Access Point) or in Infrastructure mode (networking using an Access Point). The DCF-650W will transmit data at 11, 5.5, 2, 1 Mbps. Also, the DCF-650W provides an ìAuto Fall-Backî feature to automatically adjust the speed of the adapter depending on the distance from the Access Point. The DCF-650W requires a compact flash type II interface (available in most current PDAs). To ensure long battery life, the DCF-650W has minimal power consumption of 17mA in sleep mode and less than 380mA in transmission mode. The DCF-650W is compatible with Windows CE version 3.0.