Sue:
lookin in kittie's book..... the pump is no longer manufactured.... it can
pump only one side at a time and it necessitates two hands to do so. the
steady buzz is at 65dcb.
in the 408 model the pressure increases as the bottle fills...the autmoatic
suctioning is cery slow...20-30 cycles per minute. a/e and m are in the 48-52
range.
Patricia