Symphony breast pump includes  2-Phase Expression technology, unique overflow protection, double or single pumping, one knob control, whisper quiet operation, and is easy-to-clean. This is the same breast pump as the #0240108 except it includes a rechargeable battery for portability and ease of use.    Symphony is the latest innovation from Medela in hospital-grade electric double pumps. With breakthrough 2-Phase Expression pumping, Symphony is proven to reduce pumping time through faster let-down and milk flow and remove as much milk as a breastfeeding baby. 2-Phase Expression is an advanced pumping pattern that mimics nursing rhythm of your baby by pumping in two distinct modes: - Let-down Mode - Simulates initial rapid suckling of your baby to initiate faster milk flow, or let-down. - Expression Mode - Simulates slower, deeper suckling of your baby for maximum milk flow in less time. NOTE: Personal Double Pumping Kit (as shown in picture) is not included with the pump - it is available separately.