The Q-jing manual breast pump is designed for moms who mostly breastfeed. Small, lightweight design makes it easy to transport discreetly when you're away from baby for a short time. Made without BPA safe for mom and baby. Manual breast pumps are great for the mom who is pumping occasionally. The Q-jing Manual breast pump uses innovative two-phase technology to conveniently and comfortably express breastmilk. The handle of the pump adjusts to easily switch between Stimulation and Expression phases. The Stimulation phase allows more rapid suction, similar to baby’s suction pattern at the beginning of a breastfeed, to elicit a letdown. Once milk starts flowing, it’s easy to switch to the Expression phase which provides slower cycles with more suction to efficiently express breastmilk. The ergonomic easy-express handle allows for comfortable positioning to reduce hand fatigue, The soft rim on the flanges provides a more comfortable experience and creates a better seal when pumping. milk storage and baby bottle feeding range.EASY TO CLEAN AND STERILIZE-Clean the pump and lid with water. Notice that wash by hand or dishwasher, and recommend to put it on the top rack of the dishwasher. Sterilize the pump in boiling water for 3-5 mins, Do not put in the microwave