SonataTM, Medela's double-electric breast pump with 2-Phase Expression® Technology, is our smart breast pump designed with you and your baby in mind. Created to enhance your breast milk feeding experience, Sonata delivers: - Smart SolutionTM connects Sonata to our MyMedela® app, your breast milk feeding resource for an instant connection to your personalized pumping dashboard. Real-time tracking of your baby's growth and pumping sessions, including unlimited access to evidence based lactation information and personalized content designed to help you reach your breast milk feeding goals. - Responsive Pump Technology automatically adjusts to the body and environment and makes sessions more consistent and productive. - Quiet when it matters most for discretion in all situations, including late night pumping sessions. - More milk in less time with 2-Phase Expression Technology when double pumping, compared to single pumping. This research based technology, uses two distinct phases, just like breastfeeding babies: 1. Stimulation Phase: to start the milk ow, when babies first go to breast, they suck fast and light. 2. Expression Phase: after milk ow or “let-down" starts, babies breastfeed with a slower, deeper suck, bringing out more milk faster. - Efficiency and comfort with Medela's research based PersonalFit FlexTM Breast Shields delivering 11.8% more milk per minute faster. Designed to reduce pressure on the breast and optimize milk flow. **Compared to the traditional 90° breast shield Details & SpecsProduct name:Sonata® Double Electric Breast Pump with PersonalFit FlexTM Breast ShieldsProduct dimensions:10.38" H × 16.5" W × 9" LShipping dimensions:10.38" H × 16.5" W × 9" LShipping weight:8.25 lbs.Requires:Lithium - Primary - Lithium 1 batteries - Not IncludedUPC:0020451367507Appropriate for ages: All ages