The New Spectra Dual S hospital grade double breast pump offers the most advanced and up-to-date technology in the breast pump industry. This pump is the most powerful breast pump with 15 levels of adjustable pumping. It is the first breast pump of its kind that allows moms to adjust each side independently. If you are one of those mothers who have a “slacker boob” or one side produces more milk than the other, then this electric breast pump can help you maximize your milk output from each side. This advanced technology promotes more productive pumping sessions that can save time with comfort and ease.