The most important difference between the Medela Pump in Style Advanced model and the Original is that the Advanced pump includes a pretty remarkable feature that actually mimics a babys nursing rhythm by pumping in two distinct modes: let-down and expression. In the first few moments of nursing, babies initiate faster milk flow by suckling rapidly. After the flow is established, baby switches to slower, deeper suckling for maximum milk flow in less time. The "Natural Expression" system simulates this two-stage pattern for a highly efficient, effective pumping experience. In other ways the pump is similar to the also first-rate Original: a stylish and professional looking black shoulder bag houses the pump with adjustable speed and vacuum control, along with battery pack, AC adapter, four bottles with lids, bottle stands, "PersonalFit" breastshields, removable cooler carrier with ice packs, bottle holder, extra storage pockets, and a built-in picture frame for a photo of your pride and joy. The advanced model also includes CSF breastmilk bags, a padded carrier case for the battery pack, and a removable motor bag. --Emilie Coulter
A double electric personal use breast pump ideal for daily use. Natural Expression pumping, One touch let-down button designed for faster milk flow, customized pumping with adjustable speed and vacuum control. Stylish backpack contains everything mom needs to pump. Battery Pack for pumping anywhere, anytime. Includes: Pump In Style Advanced Breastpump with 2 Phase Expression pumping in a stylish black microfiber backpack bag, Removable cooler carrier, Removable motor unit, Double pumping accessory kit, Manual breast pump, Cooling element, AC adapter, Battery Pak with soft cover #9017004, 4 collection containers and lids, 2 container stands, Breastfeeding Information Guide, Free breast pumping accessory samples.