Breathing, as well as rhythm of heartbeat is a repeating process, which forms perception of time as a subjective reflection on duration of events. Breath is that makes us alive.
The form of the object allows to take it with both hands as something valuable. On a surface of the mirror time is indicated by subtle hour hand, only if user breathes on it. Breathing of the user not only create time, but also proves that user is alive and not frozen in stasis.