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 modeBATTERY 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 outFOOD 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 dishwasherSAY NO TO BACKFLOW🤚: Anti-backflow design of the electric double breast pumps prevent valve stops milk flow from the bottle into the body and the silicone diaphragm blocks milk flow to the pump. Moms need not worry that the milk might damage the machine. It is recommended to start with a full charge before the first use. After cleaning the accessories, please dry them completely before use, otherwise it may damage the main unit and the suction power becomes weakerNOISE 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