Features Imitate the babys feeding pattern, at the beginning of milk suction process, high frequency mode will gently stimulate milk lactation, when the milk starts flowing, it will change to slow and deep suction, reducing suction time by 50% and increasing milk secretion by 30 ...Features Imitate the babys feeding pattern, at the beginning of milk suction process, high frequency mode will gently stimulate milk lactation, when the milk starts flowing, it will change to slow and deep suction, reducing suction time by 50% and increasing milk secretion by 30%. 2 modes (breast pumping massage) and 5 levels of suction for option, always gives you the most comfortable milk sucking experience. The memory function will remember the settings used last...