Here comes Medela's latest innovation in hospital-grade electric double pumps Symphony, tested and proven to reduce pumping time. The first and only breastpump with a 2-Phase Pumping Program. Let-Down and then a slower, deeper rhythm for efficient milk expression. The pumping programs are stored on a program card, which enable the programs to be utilized in the future. Symphony implements the results of extensive research on electric breast pumps initiated by Medela; and conducted by internationally renowned lactation researcher Peter Hartmann, Ph.D. Medela products are not only durable, but rated as the best quality Breast Pumps of which the Medela Hospital Grade Breastpumps are the latest improvement. This model comes with both options of battery powered (including battery pack) and wall powered including the wall adapter.    What is included:  Symphony breast pump x1;  Rechargeable batteries x1;  Symphony 2.0 Program Card x1;  container stand x1;  quick start card x1;  protector for card/cord x1;  Instructions for use x1;  Carrying case and breast pump kit sold separately