Three different pumping styles – massage mode, two-phase mode and expression mode. The anti-backflow design provides a hygienic closed system to keep breast milk from backing up to the pump, prevent infection and keep milk fresh.. The easy-to-use interface consists of just six buttons.. The digital screen displays information such as the current mode, the suction level and elapsed time.. USB-rechargeable internal battery gives you to flexibility to express wherever and whenever you like, with no compromise on pumping performance..