Efficient & Leak-proof Design Hands free breast pump is built-in superior motor, max suction value reach to 287 to 320mmHg. New moms can customize switching or mixing 9 intensivity levels for different 3 modes (stimulation+expression+mixed)to get a effortless and fast breast pumping. Designed with a closed system to prevent milk from flowing back or overflowing.Quiet Design & LightweightBreast pump hands free generate 40dB noise reduction,new moms can enjoy a high frequency but a quiet pumping even at nighttime.the electric pumps is a small unit that sits entirely inside your bra. 6oz capacity and tick mark make it an easy way to store breast-milk for the next feeding,double sealed flange protector help suck every drop of breast milk.Configurable in Various Sizes ergonomic breast pump S12 Pro with 4 sizes 19/21/24/28mm(included), fit for different breast shapes, set your hands free to enjoy breast pumping even when working, cooking, doing yoga, feeding baby, reading, traveling, driving, shopping, on a business trip etc.Smart Breast PumpSmart display of Breast pumps, you can recognize exact mode or level selected, time for duration, battery status. Fast level switching is available, long touch + - to reach a max or minimum pumping rhythm at ease, wearable breast pump portable hands free shutdown automatically every 30mins if you forget turn off the pumps.