Freedom without compromise: All the performance of a regular electric pump, in a wearable design that fits comfortably inside your bra ConstantComfort™: Smart ConstantComfort technology is specially designed to mimic your baby’s natural suckling sensation and holds the pump in place for an effective, yet gentle pumping experience Nipple alignment light guide: Especially useful in dark settings, you can ensure a better and more comfortable positioning of your nipple by using the light guide to direct you.