I sent email to Mr. Ho and asked him both NFB-12 and 11. I agreed that NFB-12 is similar to NFB-11 which should have ACSS. The Chinese web page of NFB-12 did not mentioned ACSS and I asked Mr. HO about the availability of ACSS on NFB-12 and he replied NO. Let me check with him again.
Thanks for making your first post, So you spoken to Mr Ho
How did you manage to get him, by phone or email
On the Website it is written all over the pages on NFB12 page
That it is using ACSS, The Amplifier section of the NFB11 looks exactly like the NFB12