Medela’s Pump in Style with MaxFlow technology is a hospital-strength double electric breast pump inspired by Symphony, our hospital-grade pump. This powerful pump features built-in letdown and massage mode cycles that transition automatically, for a clinically-proven increase in milk volume of up to 11.8%. An intuitive control panel lets you increase or decrease vacuum strength across 10 levels for maximum efficiency. Y-shaped tubing offers single- and double-pumping options. Included are two sizes of our oval-shaped PersonalFit Flex breast shields for increased comfort, along with a battery pack for pumping on the go. Keep your Pump in Style MaxFlow parts together in the stylish microfiber pump bag. What's Included: (1) Pump in Style Double Electric Breast Pump; (4) 5-oz./150 mL bottles with lids; (2) 21mm PersonalFit Flex breast shields; (2) 24mm PersonalFit Flex breast shields; (2) Breast shield connectors with membranes (using incompatible parts could cause irreversible damage to your breast pump); (1) Breast pump tubing; (1) Cooler bag; (1) Cooling element; (1) Microfiber bag; (1) Battery pack (8 AAs not included); (1) Dual Voltage 110-240V Power Supply Adaptor. *1-Clinical studies, PersonalFit Flex compared to PersonalFit data on file (NCT02496429, NCT02492139, NCT02719548, NCT03091985); **IQVIA ProVoice Survey; September 2019-August 2020. If you have any questions or concerns with your Medela pump, please contact Medela (toll free) at 1-800-435-8316 before reaching out to your place of purchase. Our award-winning customer service team is ready, willing, and able to answer any, and all questions you may have!