HP Wireless Interface L1640A is compatible in the following HP Models:

HP Projector Connectivity Modules

HP SMART ATTACHMENT MODULE - L1619A

HP Flash Memory

HP 802.11B COMPACT FLASH WIRELESS LAN CARD - L1640A

HP 802.11B COMPACT FLASH WIRELESS LAN CARD - L1640B

HP 802.11B COMPACT FLASH WIRELESS LAN CARD - L1640C