Sonata with accessories: 1 Sonata breast pump with rechargeable lithium-ion battery, 1 breast pump bag, 1 set of tubing, 4 bottles of 150 ml with lids,1 power adapter. Also includes 2 of each: breast shield connectors, connector caps, valves, silicone membranes, 24 mm and 27 mm PersonalFit breast shields, bottle stands. Don't have the cooler/ice pack Sonata, Medela's NEW double-electric breast pump with 2-Phase Expression Technology, is our smart breast pump designed with you and your baby in mind. Created to enhance your breast milk feeding experience, Sonata delivers: - Smart Solution connects Sonata to our MyMedela app, your breast milk feeding resource for an instant connection to your personalized pumping dashboard. Real-time tracking of your baby's growth and pumping sessions, including unlimited access to evidence based lactation information and personalized content designed to help you reach your breast milk feeding goals. - Responsive Pump Technology automatically adjusts to the body and environment and makes sessions more consistent and productive. - Quiet when it matters most for discretion in all situations, including late night pumping sessions. - More milk in less time with 2-Phase Expression Technology when double pumping, compared to single pumping. This research based technology, uses two distinct phases, just like breastfeeding babies: 1. Stimulation Phase: to start the milk ow, when babies first go to breast, they suck fast and light. 2. Expression Phase: after milk ow or "let-down" starts, babies breastfeed with a slower, deeper suck, bringing out more milk faster. Dimensions : Unit weight: 2.2 lbs. (breast pump only)/8.18 lbs. (retail package)