The two product illustrations NOT is the "SF-AH 50", but the "SF-HA 50" (see figure below).
The "SF-AH 50" has NO "filter change indicator" as the "SF-HA 50" !!! So do not wonder at the delivery.
For product:
Use my S8 from floor to bed for anything. Quite pricey for a filter. However, if the filter can actually comply with the advertised hygiene, it's okay.
EDIT:
Figure seems to be correct now.