Upgraded Experience: This wearable breast pump with 4 modes & 12 levels. More mode options help make the wearable breast pump more comfortable to use. Imitating the baby's actual breast feeding frequency and suction stength to optimize milk production. Longer Battery Life: Portable breast pump with 1100mAh battery capacity, Fully charged can be used for 180 minutes, One day per charge. Safe Material & Low Noise: Hands free Breast pump is made of food-grade soft silicone to ensure the safety of babies and mothers.The sound of this electric breast pump is less than 40 dB when used, and will not disturb the baby's sleep. Leak-Proof Design & Easy to Clean: One-direction silicone valve can effectively prevent breat milk backflow, Increase container sealing edge. Protect every drop of precious breast milk for moms. 24mm Flange: The wearable breast pump is suitable for breast sizes with nipple diameters ranging from 13mm to 24mm. Accessories need to be purchased separately.