BSC-15 product questin

hello BS experts,
can you tell me, how many cards are in a BSC-15 booster pack? and how many packs in a box? it is a special subset or not?!

Battle Spirits' fifteenth booster pack, "Dream Booster: BURST IMPACT", is a series of 16 all-new cards put together with 34 reprints of cards from the Hajime Hinobori Theme Deck "Burst Heroes" (Starter Deck #06) and the Supreme Heroes Saga (Sets 14~18), as well as a few assorted promo cards (Released 23 November 2013: 18 Commons/12 Uncommons/8 Rares/5 Master Rares/7 X-Rares; all reprinted older cards are redesigned with the current card frames, some with alternate art!). What I found out was that not only is every card in this set a Burst Card, but there are 2 cards in each booster pack of Burst Impact you buy that will be of a Rare or higher rarity guaranteed.

As soon as I finish Set 24 (Ultimate Battle 01), I'll be more than happy to go into detail on the card list, as well as the new cards featured!

thnx for the detailss, and i made a thread for some BS news jp page that i found, with bsc-15 as it seems. but i can't translate anything, so maybe nobody needs that page anymore?!