【2 x Upgraded Wearable Breast Pump】- The MomMed Wearable Breast Pump (Model S21) features 3 modes (Stimulation, Expression, Auto) and 12 vacuum levels to mimic natural baby sucking. Customize your pumping for efficient, comfortable, and pain-free milk expression 【Leak-Proof Design】- The upgraded MomMed double electric pump features a key improvement in its structure: a backflow prevention membrane that physically separates breast milk from the vacuum system. This ensures safer operation and reduces the risk of leakage. Measuring correctly and choosing the right flange size help breast milk flow smoothly 【More Invisible & Lightweight】– The portable breast pump with ergonomic semi-circular design fits snugly in your bra for discreet pumping. Weighing under a pound and fully wireless, you can pump anytime—while feeding, working, driving, or on the go 【Convenient & Quiet】- The hands free breast pump features an LED screen and physical buttons for easy, durable operation. Low noise (