Features:Made of premium BPA-free material, safe for use.Bilateral design, promote the milk pumping speed.Frequency pumping, multiple sucking levels, each mother can adjust the levels according to her need.Soft silicone suction nozzle can imitate the real feeling of a baby sucking to pump efficiently without pain.Anti-reflux design makes a closed pump system to ensure freshness of milk, protecting the health of babies.Low noise working, provides a comfortable sleeping environment for the baby without disturbing other people.Can be flexibly assembled and disassembled, except for the electrical parts, all other removable parts are dishwasher safe.USB power supply, supports connect to the portable source, power adapter, notebook, ect.