The Spectra S2 hospital grade electric breast pump is efficient, simple and easy to use. It is lightweight and extremely quiet, allowing you to pump without disturbing your sleeping baby. The S2 includes the feature of "massage mode" which simulates the natural suckling of baby, adjustable and comfortable suction levels, providing a more natural flow of milk. The S2 has a closed system to prevent milk backflow, making it safe and hygienic for you and your baby. The unit has a built in gentle nightlight and timer, along with 2 breast shield sets to allow for double pumping.