Compact bodynThe sound is very quiet, and mimic breastfeeding babyn14 suction speed can be adjustednUSB-powered mode, it can easily use at how places.nCharging treasure or PC can be connected to use, easy to carry.nThe electric breast pump using the world's latest exclusive and development of technology 5 stage stimulation mode,9 stage experssion mode,produces the closest baby sucking breast milk natural rhythms. stimulation mode Fast-paced intensive outflow to stimulate breast milk. expression mode(suck ---put---stop) Gentle and regular rhythm with mild to effectively suck out brest milk. This breast pump sycton has 14 gear position to choose from: 5 suction mode 9 expression mode According to the increase or decrease in gear position efforts to control breastpump, the greater the value,the greater the suction.