Welcome to Sonata, a smart double electric breast pump from Medela that has been carefully designed with the comfort and convenience of both mom and baby in mind. Engineered with 2-Phase Expression technology and smart capabilities, Sonata seamlessly connects to the MyMedela app for unlimited access to your personalized dashboard, real-time tracking of your pumping sessions and baby's growth, and a variety of breast milk feeding resource, including evidence-based lactation guidance and personalized content to help you reach your breast milk feeding goals. Now with our PersonalFit flex breast shields allow you to pump comfortably in a variety of positions, while a 105-degree opening angle helps reduce pressure and removes 11.8% more milk per minute than pumping with traditional breast shields**. Key features: Powerful hospital performance; Rechargeable; Touch screen display; One-touch letdown button; Smart breast pump that connects to our MyMedela app; Ultra-quiet and discreet; Customizable and flexible with an adjustable timer. What's included: (1) Sonata breast pump with rechargeable lithium-ion battery; (1) breast pump bag; (1) double pumping kit, including 2 breast shield connectors, 2 Connector caps, 2 valves, 2 silicone membranes, and 1 set of tubing; (1) set of 21 mm and 24 mm PersonalFit Flex breast shields; (4) 5oz breast milk bottles with lids; (1) cooler and cooling element; (2) bottle stands; (1) power adaptor. All parts that touch breast milk are made without BPA. *IQVIA ProVoice Survey, September 2018-August 2019; **When comparing double pumping to single pumping, with 2-Phase Expression technology at Maximum Comfort Vacuum. If you have any questions or an issue with your Medela pump, please contact Medela (toll free) at 1-800-435-8316 before reaching out to your place of purchase. Our award-winning customer service team is ready, willing, and able to answer any, and all questions you may have!