The Ardo Calypso To Go has two power options. AC (included) or AA batteries (not included). Among other features, Ardo claims to be the quietest breast pump on the market today and provides support documentation. The Calypso To Go comes with a stylish breastfeeding bag. Kit INCLUDES Double Electric Calypso breastpump, 2 pumpsets, with multiple breast shells (26 mm and 31 mm), 2 breast shell inserts (28 mm), 2 Optiflow 26 mm, Brush for cleaning,Bottle holder, Battery compartment, Power adapter, 2 lip valves (spare part), 6 milk bottles, Insulated Cooler bag and cooling insert - Amaryll operating lever for manual pumping. Includes Online Video Instructional and telephone lactation support.