Medela Sonata Smart Breast Pump with PersonalFit Flex Breast Shields.Medelas Sonata Smart Breast Pump is a daily use, double-electric breast pump designed with you and your baby in mind and built for moms who pump several times a day.Smart Solution connects Sonata to our Medela Family 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.