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.