How long does one patch work, and how should it be stored correctly? — Shower aroma patch N5

According to the card, one patch works for up to 8 hours and is intended for single use. Store at room temperature in a dry place protected from light, out of the reach of children; do not use the patch if the integrity of the package is broken. The package contains 5 patches measuring 50 × 60 mm.

General information (not a manufacturer's instruction): the patch must not be reused, as the card says.