Intuitive and hassle-free. Solo, the effortlessly easy pump to use. It has only a few parts making is easy to clean and assemble. With its intuitive 4-button interface and 9 pre-programmed settings this single electric breast pump is extremely easy to use. Pump wherever you are, even if no power outlet available. With the cutting-edge available USB type C connector on the Solo single electric breast pump, the built-in rechargeable battery charges faster compared to the micro USB port, lasting for up to six pumping sessions when fully charged 2-Phase Expression technology. During a feeding session, babies start by using short, fast sucks to stimulate the Milk Ejection Reflex. Once the milk begins to flow, babies change to a slower, individual rhythm. Medela's 2-Phase Expression technology mimics baby’s natural sucking rhythms – faster to stimulate milk flow, then slower to provide optimal milk flow. PersonalFit Flex breast shield. With a 105-degree opening angle, soft rim and oval shape for a better fit, the PersonalFit Flex breast shield puts less pressure on your milk ducts than traditional breast shields, resulting in a more effective and comfortable pumping experience. More comfort for you, up to 11.8% more milk for your baby – clinically proven. Closed system prevents breast milk from entering the tubing, overflowing and leaking into the pump mechanism. This helps ensure that your expressed milk stays safe and clean, but also that your pump's components are protected from potential damage.