Check the listing for details. National Instruments PXI-8420 RS-232 Serial Interface Module Card 185447D-01. Condition: Used. Listed at 175.00 USD. National Instruments PXI-8420. Used Condition PURCHASE it with the understanding that you know what you're buying and how to use it. We make every effort to be accurate in our listings. If an error was made, contact us directly . We'll correct it to the best of our ability We want it to be clear to buyers that all items are SOLD AS PICTURED We do our best to describe each item accurately. We try to provide all known information. We usually provide additional detailed pictures, which provide visual details of our items descriptions, showing everything included in the listing We ship FAST in the Continental USA. Please give us time to respond. We are a business operating in Mountain Time. We are in during normal business hours Monday Through Friday