Compaq iPAQ 249709-B21 Compact Flash Card Expansion Pack Plus for 3600, 3700, 3800, 3900, 5400 series Increase the file storage space on your iPAQ Pocket PC Type I or Type II CompactFlash cards Access your company's network (LAN) for e-mail and Web browsing using a standard network cable compatibility: iPAQ 3600, 3700, 3800, 3900, 5400, and 5500 series one-year limited warranty