Up for sale is ONE Plug in Module Only for a 3488A or 3499A Switch System, 5 types/variations with different qtys and price points, all are used, sold as pictured in the pics, un tested, un calibrated and sold in used and working order featuring ONE HP AG either a 44470A, 44471A, 44473A, 44474A and or a 44477A matrix switch, general purpose relay, digital I/O, Form C and a relay mux.  See pics for details and add 19.99 for shipping fedex ground within the Continental USA not including Alaska, Canada, Mexico, HI, PR or any out of country shipments.  Listing setup to ship international thru ebays International shipping center.  Ebay will bill you all shipping and import charges from ebay's KY USA shipping center.  So note.  My shipping charge is to Ebay KY's USA Warehouse.