Comfort ProperFit Soft Silicone Cushion Provides a secure seal and comfortable fit for more efficient pumping. 2 Phase Technology – Stimulation and Expression modes. Stimulation mode gently stimulates the breast to initiate milk flow and Expression mode to maximize milk flow. Customizable Pumping Style – 7 adjustable suction levels with 4 adjustable suction speed to choose from. LED monitor – Easy to use and view. Hygienic design to prevent milk from flowing back to the funnel. Bottle stand Secures bottle to prevent spills.