Natural Nursing Technology: Our Spectra S2 electric breast pump features technology that allows comfortable suction levels that mimic the experience of natural breastfeeding as closely as possible Personalized Settings: Adjust the breast pump settings to fit your preference with adjustable suction levels and two phase cycling featuring expression and massage mode Single or Double Pumping: Can be used as a single electric breast pump or a double electric breast pump and for best results, authentic Spectra Baby accessories are recommended Complete Pumping Accessories: Receive all pumping accessories compatible with S2 pump so you are prepared to begin your breast pump journey Convenient Storage: The grey breast pump tote creates convenience for carrying your pump, bottles, and pumping essentials on-the-go and also Includes laptop storage.