Civic 1999 Cassette Player buttons

Hey I always wondered what these buttons do.

On the Stock Player on Honda Civic 1999 Gli Sedan at the bottom it has 1,2,3,4....

On 1 its also got "BNR" and on 2 its got "B.S".

When I put the tape in and press 1 or 2 it shows "BNR" or "B.S" on the display. Ive noticed that "BNR" somewhat makes the music doing deep but "B.S" doesn't really do much.

Can someone please tell me what these buttons are there for?

Thanks,

BNR is the noise reduction - aids in reducing white noise i beleive
B.S is blank skip - allows you to skip from the ending of a track to the beginning of the next track (Skipping the silence from the first tracks ending)