Please help to fin exact model of Hikvision DVR (possible DS-7216HUHI-K2)

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Hi all,
purchased this device at ebay:
Label at bottom says:
DS-7216HUHI-K2
system info:




but with this label (DS-7216HUHI-K2)i see different pictures in various sites:

So im a bit confused: what real model i have?
Probably DS-7216HUHI-K2/16A or DS-7216HUHI-K2 (S) or ....

and what latest firmware do i need to use?
thanks!