USB powered electric breast pump:USB powered, USB transmission interface, multiple power supply modes, power supply anytime, anywhere, use breast pumps anytime, anywhere. Household power supplies, notebooks, mobile power supplies and computer hosts can be used. Comes with USB cable, safer and more efficient electric breast pump. Painless and fast sucking - 2 modes (pump mode and massage mode), 9 Stages for suction mode. Massage mode helps push milk out of your milk ducts and reduce breast discomfort; 9 suction levels ensure that every mother can find her own rhythm and produce more milk in less time. Anti-backflow design: You don't have to worry about the milk breaks the machine. The professional backflow protection prevents milk from entering the electric breast pump and keeps the milk clean. All parts of the breastfeeding pump are made of food-safe materials. Easy to clean and disinfect. Low noise and strong suction: Ultra-quiet technology produces a gentle vibration and a low-noise atmosphere below 45 dB; The maximum suction power is up to 350 mmhg. The electric breast pump provides a comfortable and quiet environment for babies and mothers. Small size and large capacity: It is small in size, light in weight and can hold 150ml of milk. Just slip it in your bag and carry it with you.