Medela sets the standard in breast pumps - that"s why it"s #1! This hospital-grade, double breast pump features Medela"s exclusive technology, which replicates baby"s sucking pattern. The result? Fast, comfortable pumping and optimum milk production. Includes removable motor, cooler, and everything else you"ll need, all housed in a sleek messenger bag. Includes AC adapter, or use with 8 "AA" batteries (sold separately). Only Medela pumps use research-based technology that replicates baby"s natural sucking patterns: a faster Stimulation Mode, followed by a deeper, slower Expression Mode. The pump switches modes automatically, or you can control it yourself with the press of a button. With one adjustment, you can set the pumping speed/vacuum intensity for comfortable, personalized double or single pumping Includes everything you"ll need to get started, including: Quiet, removable 9-volt motor, housed in its own carry case Portable work surface for hygienic, on-the-go pumping Removable cooler with ice pack for up to 12-hour milk storage Four 5 oz. self-standing, Bisphenol-A free bottles with lids. (Bottles remain self-standing, even with pump attached). SoftFit™ breast shields Two mesh storage bags for holding pump parts Soft-cover battery pack (8 "AA" batteries sold separately) Fashionable messenger bag features adjustable, reversible straps and additional pockets for personal items. Stain-resistant, wipe-clean nylon; lives on a carry bag later! Compatible with Medela"s 9-Volt Vehicle Lighter Adapter (sold separately) Clean pump parts easily with our QuickClean™ microwavable steam bags (sold separately)