Easy assembly, usage and cleaningIt fits perfectly to your chest with soft and comfortable silicone chest shieldDesign for one -hand use gives you comfort and comfortSpecial Design Bottle and Title for Stored Milk

Vacuum (approximately): approximately <-250 mmHgBreast Shield Size: 24 mm (optional 27 mm)Unit weight: about 159 g (5,61 oz)Unit Dimensions: 205 x 186 x 90mm (U x g x y)

Working environment:Temperature: 5 C ~ 40 C (41 F ~ 104 F)Moisture: 15 ~ 93%RhPressure: 700HPA ~ 1060HPA

Storage Environment:Temperature: -20OC ~ 55OC (-4of ~ 131of)Moisture: ≤ 93%relative humidity