More milk in less time: the soft, silicone cup features massaging petals that work to stimulate your breasts so you can express more milk in less time*.easy to clean and assemble: the one-piece horn allows for easy assembly and cleaning and features a closed system that prevents breastmilk backflow. lightweight and slimline: the lightweight power unit is pocket-sized and lightweight enough to carry in your bag so you can express breastmilk anytime, anywhere.usb rechargeable: powered by a usb rechargeable power unit so you can use this breast pump anywhere. full charge gives you over 60 minutes of cord-free pump time.