NI USB-RS232/4 converter

Description

We bought this converter a couple of years ago figuring on needing to communicate with multiple serial instruments at some time. We have a better way to do it now, so we don't need this converter. I plugged it into our data acquisition computer and plugged in a couple of serial instruments. It works perfectly. It shows up on NI-MAX as 4 different com ports, as it should.
Converter-to-computer cable is included, as are the manual and serial software disc. Brand new from NI, these are 4.