The Spectra S2 Plus Hospital Grade Double Electric Breast Pump is designed to bring confidence and comfort to every moment of the breastfeeding journey. It works quietly and discreetly for soothing pumping. Spectra S2 Plus has a massage mode, backflow protector which protects breastmilk from harmful bacteria, and adjustable speed and suction strength. It also has an auto-timer with display and night light which allows mom to easily pump at any hour. It is made with Natural Nursing Technology which simulates the natural way a baby nurses and promotes a more comfortable pumping experience.