What preperation needed for the interview at uae?

[immihelp]

Dear sir
i am a us citizen and i filed i 130 for my husband and it is completed at the nvc on the 16th of september. How long he has to wait for his interview? He is going to have his interview at us consulate abudhabi. What are the documents and preparation needed for the interview at uae?

Thanks and regards

[immihelp]

1. Timings vary all the time.
2. /usa-immigrant-visa-process/