The Lansinoh® 2in1 Electric Breast Pump was designed to mimic the baby’s natural feeding pattern and comes with two phases: ‘let-down’ which stimulates the milk flow through quick and short suction and ‘expression’ which maximises milk flow through longer, deeper suction. The ‘phase’ toggle button enables you to make an easy transition between the two phases. In ‘expression’ phase, you also have a choice between 3 different pumping styles which you can further tailor for comfort by selecting one of eight different suction strength levels.