The Medela Freestyle breast pump is the world's smallest high-performance electric breast pump, and gives a mother more time and flexibility in her everyday life. It's ideal for daily and frequent use with a single or double pumping option. Medela uses 2-Phase Expession as standard. The 2-Phase Expression is the only research based breast pump technology to mimic a baby's natural nursing rhythm. It combines both rapid stimulation and slower expression so pumping is gentle, comfortable, and efficient. The Freestyle breast pump also comes complete with PersonalFit Breastshield which is available in various sizes to suit mum. A shoulder bag is also included which contains a cooler for on-the-go convenience. The rechargeable battery provides 3 hours pumping time.