medela symphony breast pump electric and rechargeable battery #0240208 medela 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.