Quietest Breastpump on the Market. The Calypso Double Plus breastpump features independent vacuum and cycle adjustment -- 64 total settings. "Vacuum Seal" technology creates a closed system -- no milk in the tubes or pump. Includes three different sizes of breast shells to ensure that you can find the right size for comfort and efficient milk expression. The soft Optiflow massage inserts (26mm) actively massage the breast and ensure efficient and gentle expression. Ardo's 400 hour warranty (or one year -- whichever is better for mom) assures the you of a reliable Swiss-made breastpump that you can depend on. AA battery operation for use without electrical power. WHO Code Compliant. Available for international shipping.