Our new Medela Solo single electric breast pump uses 2 Phase expression technology to simulate natural baby sucking behaviour at the mother's breast. Solo is more compact than the Swing breast pump and has a built-in rechargeable battery with USB type C connector, saving you time and allowing you to use it without having to recharge for up to six pumping sessions. Solo is a single electric breast pump with closed system, that 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.