MODES AND STIMULATION 📳: NCVI electric breast pumps for women comes with 4 modes and 9 levels. The massage mode is used to stimulate the breasts. To produce normal milk, you can use multitronic suction, Suck Stimulation Mode or Express Pumping Mode. Mothers can choose the best pumping intensity by using comfort mode BATTERY POWERED 🔋 : NCVI double breast pumps 2200mAh lithium battery allows it to run for up to three times without needing to be charged. It can be charged using power banks, computers, or a car adapter. You can go worry free about the usage of product when out of home or suffering a power out FOOD GRADE, NON BPA 🎣 : NCVI electric breast pumps for women is made with food grade silicone. Each component can easily be disassembled and assembled. Other than the electrical parts, all removable parts can also be assembled and disassembled in a dishwasher SAY NO TO BACKFLOW🤚: Anti-backflow design of the electric double breast pumps is flawless, so moms need not worry that the milk might damage the machine. The milk backflow prevent valve stops milk flow from the bottle into the body and the silicone diaphragm blocks milk flow to the pump NOISE FREE PERFORMANCE 🚫: Double breast pump electric is made with better craftsmanship. The baby won't be woken by the gentle milk sucking and low noise design of 40 dB. The electric breast pump has a longer battery life, and is easier to use. Mom can rest assure about baby sleep and use electric breast pump double freely