LCD Display provides status of programs and functions Control suction and speed to suit your comfort level with a total of 28 pumping state options 2 Phase Expression Stimulation and Expression Mode Easy to assemble and clean silent for discreet pumping Passive prevention of milk backflow Single or Double Pumping Options BPA and Latex Free Two 4oz Bottle Feeding Adapter Kits and Storage Containers with Lids Piston Pump System imitates baby's sucking rhythm Includes A/C Power Supply & External battery pack 6 AA alkaline batteries (not included) One Year Limited Warranty