It's an infra-red dongle that I use for my Accu-Chek Aviva as well, so it is a standard download device. It's needed to upload the pump to the Animas program. (EZ manager Max, something I never use.) I'd call Animas to see if they can send you one.
Once you have one, it's a little tricky to get the dongle to lock on and start uploading.