This is a Psion II Comms Link, 4 line version. Although it was designed for the LZ/LZ64 models, it works with XPs (though obviously only shows 2 lines of the menu at a time). Although it is a male 25pin terminal it now comes with a free 25 pin F to 9 pin F connector which is much more convenient for most users. Good working order with manual. Best used with Psi2Win software rather than the original Psion II CL software.