The D-Link DCF-660W is a wireless Compact Flash card that is IEEE 802.11b compliant. The DCF-660W provides a solution to connect PDAs (Personal Digital Assistants) to an existing IEEE 802.11b wireless network. The DCF-660W operates in the 2.4GHz frequency range and utilizes Direct Sequence Spread Spectrum (DSSS). The DCF-660W is for users of PDAs who want the convenience of roaming and connecting to an existing wireless network without being tethered to wires.

The DCF-660W will operate in either Ad-Hoc mode (networking without an Access Point) or in Infrastructure mode (networking using an Access Point). The DCF-660W will transmit data at 11, 5.5, 2, or 1 Mbps. Also, the DCF-660W provides an Auto Fall-Back feature to automatically adjust the speed of the adapter depending on the distance from the Access Point. In an open environment, the DCF-660W with its built-in antenna has a range of up to 460 feet at 11Mbps and up to 1,311 feet at 1Mbps.

The DCF-660W requires a Compact Flash type I or II interface (available in most PDAs). To ensure long battery life, the DCF-660W has minimal power consumption of 80mA in Power Save mode and less than 350mA in transmission mode. The DCF-660W is compatible with Windows CE version 3.0 and Pocket PC devices.