Harmony is a single, manual (hand-powered and non-electric) breast pump designed for occasional use. This breast pump is a great option for travel or as an occasional back-up to your double electric breast pump. A small, lightweight, and portable design makes transport easy and discreet for convenient pumping at home, at work, or on the go. Best of all, an included PersonalFit Flex breast shield means more milk faster, when compared to the traditional 90° breast shield. These shields are designed to reduce pressure on the breast and optimize milk flow, giving you more milk faster.