Features: Three Breast - sucking Modes with 9 Gears Each: This breast pump features three major breast - sucking modes: massage, frequency conversion, and breast - sucking. Each mode has 9 adjustable gears, allowing mothers to customize the suction level according to their comfort and needs. Simulate Baby Natural Sucking: The pump is designed to mimic the natural sucking rhythm of a baby. It has two stages: the first stage stimulates lactation with fast and urgent suction, massaging the mother's nipples and areola to promote milk secretion. The second stage slows down to a slow and deep breast - sucking mode when milk flows out of the nipple. The breast pump is equipped with several advanced features: Three Major Breast - sucking Modes: Allows for versatile use. Grade 9 Gear Adjustment: Enables precise control over suction intensity. Small Size and Easy to Carry: Portable and convenient for on - the - go use. Low Noise Mute Design: Operates quietly. 1.5h Long Endurance: Provides extended usage time. Type - C Charging Interface: Offers fast and convenient charging. Additional Specifications: Suction Bowl and Duckbill Valve: The suction bowl ensures the separation of gas and milk, while the duckbill valve prevents milk from flowing back. Parameter Specification: Charging Voltage: DC5V 1A Charging Current: 650mA Battery Type: Polymer battery Battery Capacity: 1200mAh Rated Voltage: 5V Rated Current: 0.6A Max Working Hours: >1.5H Milk Suction Intensity: 40mmHg - 300mmHg Noise Limit: 60dB Working Environment: 10 - 30C, RH15% - 93%, 700 - 1060hPa Storage and Transportation Environment: -20 - 50C, RH15% - 93%, 700 - 1060hPa Product Size: Length: 15.7cm Width: 11.2cm (when folded) and 8.7cm (when in use) Height: 4.6cm (top part) and 6.5cm (bottom part)