Cisco-Linksys WCF11 Wireless CompactFlash Card Type II (802.11b) Achieve data transfer rates up to 11 Mbps Convenient wireless connection for your PDA to an existing wireless network Compatible with Windows CE 2.1 and 3.0 Employs 2.4 GHz frequency range with Direct Sequence Spread Spectrum to prevent down time Roam up to 300 feet indoors from your network access point