Luna Double Electric Breast Pump Kit Luna (1196045_EA) 1/EAWith a suction strength of 280 mmHg, the Luna breast pump is proven to extract more breast milk in less time. Expression mode works to express milk from breasts as efficiently as possible and massage mode helps stimulate let down by mimicking a baby's nursing pattern. Closed system backflow protection keeps the motor and tubing clean, preventing contamination. Speaking of the motor: At fewer than 39 decibels, its hum won't wake up baby.