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. – Express and massage modes: 5 massage and 9 express modes. help to stimulate the breast and milk flow while still feeling gentle and comfortable as you express.