Pump In Style Advanced is a daily use double electric breastpump designed for moms who pump several times a day. All Pump In Style Advanced breastpumps offer portability for discreet pumping anywhere.The Backpack features a convenient built-in pump. Through research, Medela learned that there are two distinct phases of how babies breastfeed. Stimulation Phase - when babies first go to breast, they suck fast and light to stimulate milk flow. Expression Phase - after milk flow or "let-down" starts, babies breastfeed with a slower, deeper suck, bringing out more milk faster. The included Solution Set includes all of the Medela essentials to get you started with your breastpumping journey. Features & Benefits 2-Phase Expression technology with one-touch let-down button: Produces more milk in less time when pumping at Maximum Comfort Vacuum in the expression phase. Daily use - double-electric breastpump: Designed for moms who pump several times a day. 8 AA batteries not included. Single knob speed/vacuum adjustments: For comfortable pump settings Removable cooler bag with contoured ice pack: Holds 4 breastmilk bottles and ice pack to keep breastmilk bottles cool. All parts that touch breastmilk are made without BPA: Safe for you and your baby. The item "Medela Pump In Style Advanced Backpack" is in sale since Monday, February 18, 2019. This item is in the category "Baby\Feeding\Breastfeeding/Nursing\Electric Breast Pumps". The seller is "tummystyle_maternity_clothes" and is located in Roseville, California. This item can be shipped worldwide.