Harmony™ is a unique manual breast pump, perfect for moms who occasionally pump and need a lightweight travel companion. Compact, lightweight and portable The Harmony™ manual breast pump is perfect for mothers on a busy schedule, as a backup to an electric breast pump, or for occasional use if you normally breastfeed. It's small enough to fit in your bag and requires no batteries or cables. Moms love this manual breast pump PersonalFit Flex™ Funnel With a 105-degree opening angle, smooth rim, and oval shape for a better fit, the PersonalFit Flex™ funnel puts less pressure on your milk ducts than traditional funnels, allowing for a more effective and comfortable pumping session.. More comfort for you, more milk for your baby – clinically proven.1 ergonomic lever Intuitive lever with 2-Phase Expression technology that imitates the baby's sucking rhythm 2.3, Harmony™ is one of the best manual breast pumps thanks to this technology. To take full advantage of the lever's functionality, first use the short side at a fast pace to stimulate milk flow. Then, when you see the milk flowing, use the long part of the lever to express. It's as easy as 1 - 2 Perfect to take with you and for occasional use: Lighter, quieter and easier to use than electric breast pumps, Harmony™ is one of the best manual breast pumps thanks to the technology and PersonalFit Flex™ funnel. Easy to use and easy to carry anywhere. Manual breast pumps are ideal for expressing milk anywhere and for occasional use. For moms who pump more frequently, a double breast pump like the Swing Maxi Flex™ or the Freestyle Flex™ is a better option. Manual pumps like HarmonyTM are used for occasional pumping, to take with you or as a backup to an electric pump, as they are lightweight and portable, require no electricity or batteries, and are easy to use. 2-Phase Expression technology makes Harmony's unique because it can mimic baby's natural sucking rhythm 2, 3. Use the short side of the lever first at a fast pace to stimulate milk flow. Once the milk is flowing, use the long side to express milk. You can also control the speed and intensity to find your own optimal extraction pace.