> Made from premiumA B S, PP, and silica gel, eco-friendly and skin-friendly, even don't need to wear bras; 35dB low noise, will not disturb the sleeping baby. Salient features wearable breast pum. > 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, matching baby's feeding pattern.