The Swiss Made Calypso Essentials breast pump features a cylinder-piston technology with independent vacuum and cycle adjustment – 64 total settings, mimicking a baby’s nursing behavior. “Vacuum Seal” technology creates a completely closed system. Ultra quiet operation and hospital performance. Includes Calypso breast pump, a complete double pumping kit including 26mm breast shells, 2 collection bottles, 2 milk valves, tubing, 2 bottle stands and electric power adapter. Instruction manual included, brown box packaging. Can be operated with 110-240V 50/60Hz power adapter (included), car adapter, or AA batteries. WHO Code compliant. Best in class warranty 400 hours or a year from beginning of use.