The popular Harmony is the only manual breast pump worldwide that is based on the 2-Phase Expression Technology which mimics a baby’s natural nursing rhythm.

2-phase expression
Harmony manual breast pump with 2-phase expression, the only research-based breast pump technology to mimic a baby’s natural nursing rhythm.
Phase 1 – Stimulation Phase – just like a baby who initially suckles rapidly; stimulates the let down reflex.
Phase 2 – Expression Phase – pump automatically moves to a slower speed as the milk begins to flow.