The new Swing Maxi is a portable, compact, and easy-to-use double electric breast pump made to fit seamlessly into your lifestyle. Mimic baby’s natural feeding rhythm with our 2-Phase Expression® technology. During feeding, babies start by using short, fast sucks to stimulate the Milk Ejection Reflex. Once milk begins to flow, babies change to a slower, individual rhythm to actually feed. Medela's 2-Phase Expression® technology mimics this natural sucking rhythms – fast to stimulate milk flow, then slower to provide optimal milk flow.