The S2 boasts so many great features and is designed to truly meet the needs of moms wanting to feel confident that they have an effective, powerful breast pump to support supply while also incorporating features to make life a little easier. Be astonished by the revolutionary S2, completely different to every other pump seen previously on the market. A sophisticated, hospital strength breast pump with highly adjustable settings, and extras like nightlight and timer, at a fraction of the price you’d expect. Like all Spectra pumps, the S2 is a closed system – a physical barrier between the milk and the pump ensures hygiene and motor performance. With a maximum suction strength of 250mmHg and the ability to be used as a single or double pump, plus a host of additional features, the S2 is set to become the ultimate breast pump to support U.S. moms. Completely flexible, touch button, with the S2 pump’s digital controls. These allow you to set the pumping program to the speed and rhythm most effective for your body. The suction is adjustable in both let-down and expression mode! Includes timer and night light. This pump is also really quiet!! Backflow Protection ? Helps protect breast milk and baby from bacteria, mold and viruses while pumping. ? Keeps tubing dry by preventing air flow between expressed milk and pump tubing while pumping. ? No need to clean the narrow tubing. Customize Your Pumping Experience ? Completely Adjustable Suction and Cycling in let-down and expression mode. ? Each mother can customize her pump’s settings to her own body’s response and follow her flow to find her own best settings every time. The Spectra S2 technology makes it possible for a mother to keep the pump set on her maximum comfortable suction level with minimal noise. This comfortable and effective breast pump motor only weighs 4lbs! It is powered by and an AC adapter.