Double Electric Milk Extractor USB Electric Cold Bottle Breast Milk Extractor [Dual Electric Breast Pump] We know breastfeeding can be a challenging experience, which is why we designed this dual electric breast pump for new mothers. Our electric breast pump includes one pump and two 150ml bottles, and can be used in single or dual mode, making it more convenient and efficient for every new mother. [2 Modes and 9 Pumping Levels] The electric breast pump features two modes (Massage and Lactation Mode/Expression Mode), each with 9 adjustable pumping levels. Simulating a baby's sucking rhythm, the silicone flange delivers pressure pulses, providing a gentle massage that provides comfortable nursing and sucking. [Anti-Backflow Design] The air-liquid separation design prevents backflow and secondary contamination caused by milk backflow. This design ensures safe and hygienic breast milk collection without the risk of contamination or damage to the pump motor. Additionally, the anti-backflow feature helps maintain milk supply and prevent discomfort or pain during pumping. [Easy to Clean] Made of food-grade PP + silicone, it's BPA-free and heat-resistant. Each component can be easily assembled and disassembled. Except for the electrical components, all removable parts are dishwasher-safe and can be washed in boiling water for easy cleaning. [USB Powered, Low Noise] USB powered, you can easily power the electric breast pump via a computer, mobile power bank, or power adapter. Low noise of approximately 45dB-50dB will not disturb a sleeping baby.