Symphony is Medela's latest innovation in hospital-grade electric double pumps. With breakthrough 2-Phase Expression pumping, Symphony is proven to reduce pumping time through faster let-down and milk flow and remove as much milk as a breastfeeding baby. 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. Includes 2-Phase Expression® technology, this technology resembles a baby’s nursing rhythm . Unique overflow protection. Double or single pumping. One knob control. Whisper quiet operation. 3 -year limited warranty. Features & Benefits 2-Phase Expression® technology: Designed to mimic a baby's natural nursing rhythm. Convenient: Single or double pumping. Two separate, independent membrane units: Allows switching between single and double pumping by simply applying or removing the second collection kit to the breast. Let-down button: Moms can easily return to stimulation by pressing the let-down button. Initiate and maintain milk supply: If direct breastfeeding is not possible, as well as collect breast milk at work or during other absences from the baby. Hospital grade (multi-user): The pump's kit is separate from the pumping mechanism and protected from overflow by a specially designed membrane. Contents 1 - Symphony breast pump 1 - Symphony 2.0 Program Card 1 - container stand 1 - quick start card 1 - protector for card/cord Specifications Color: yellow Vacuum: 50-250 mmHg Power: 100-240V - 50/60 HZ 0.5A, 12V DC - 25W UL Listed Unit Weight: 7.05 lbs Unit Size/Packaging: 10 1/4 x 8 1/4 x 12 1/2 3 year limited warranty