Hubsan Official Forum

hi everyone,sorry for my english.
i have several questions about this model.
i ordered it from ebay and it comes with differnet items, balance charger,with another reciever.and with additional batteries.
first of all i am interesting about version.
i have H501S professional edition.how i guess this is not h501SS (with double S)
but in transmitter there is H501SS updated version,
how its gonna posible? owner of this item updated to wrong version???

here is pictures:

update:

i have mistaken.
on box there is h501S-S-H
and also my aircraft has long metalic plate. as h501SS has.
so this is h501SS,
but another question. why transmiiter shows only S not double SS how it shows in this video?

https://www.youtube.com/watch?v=K2u09f1z7ro