The Esperanza electric breast pump is a must-have device for every breastfeeding mum. It allows you to extract milk in a fast and comfortable way. It effectively supports and controls lactation, protects breasts from stagnation and facilitates feeding. The breast pump offers 5 stimulation level settings and 9 pumping power level settings. You can use them to adjust the breast pump performance to your individual needs. The Esperanza breast pump is very silent even when working in the top power mode, so you will not wake up your child while extracting milk. The 3 available power supply modes (a USB socket, batteries and a power supply unit) will allow you to use our breast pump at home, at a hospital, at work or on the go.   TECHNICAL PARAMETERS 3 types of power supply:  USB charge/ mains charge/ 4 x 1.5 V AA batteries (alkaline batteries NOT included) Voltage (input):  100-240 V (AC~) 50/60 Hz Voltage (output):  5 V (DC ) 1.0 A Maximum suction pressure: 0.32 bar Funnel dimensions (length x diameter): 8.7 x 0.5 [cm] Interval usage:  30 minutes ON / 30 minutes OFF 2 working modes: stimulation and suction 9 suction levels 5 stimulation levels Big LCD display Super quiet in working 150ml milk bottle Skin-friendly massage cushion High efficiency suction funnel Bisphenol A - BPA Free Natural baby sucking effect