This Chicco Electric Breastpump NaturallyMe works like a baby with 2 phases - phase 1: Fast movements that stimulate milk flow, phase2: Slower and deeper movements. The intuitive display on the breast pump clearly shows time and pump level. The breastpump has 10 different levels to suit your needs, and these are controlled very easily via the +/- buttons. Equally, it is very easy to switch from phase 1 to phase 2. You can sit relaxed when using the pump. The ergonomic angular head ensures a comfortable and efficient process. The breastpump uses 4 x AA batteries, but these are not included.