The Medela Swing Flex Electric 2 Phase Breast Pump is a single electric breast pump featuring innovative 2-Phase Expression technology that mimics a baby's natural nursing rhythm. With its PersonalFit Flex breast shield and adjustable vacuum settings, it offers efficient and comfortable pumping for nursing mothers. Key features: • 2-Phase Expression Technology mimicking baby's natural sucking rhythm • PersonalFit Flex breast shield with 105° angle for optimal comfort • 11 adjustable vacuum levels for customized pumping • Easy to clean and assemble design • Compact and lightweight for portability • Can be powered by batteries or AC adapter The pump automatically switches from stimulation mode to expression mode after 2 minutes, though mothers can manually switch modes when milk begins to flow. The PersonalFit Flex breast shield is clinically proven to express up to 11% more milk compared to standard shields. All parts can be easily cleaned in the dishwasher or by hand, and can be sanitized through boiling, steam sterilization, or using Medela Quick Clean microwave bags.