Momcozy breast pumps often come with different modes to cater to various pumping needs. There is the Stimulation Mode which simulates a baby's initial rapid sucking to trigger letdown. Expression Mode that offers slower, deeper suction to efficiently express milk. And on the S12 Pro and M5 a Mixed Mode that combines both stimulation and expression modes for a customized pumping experience. On the M5 pump, the Mixed mode also includes a vibration setting that is designed to gently loosen milk ducts.