1Wearable: Silicone valve helps prevent milk leakage. The breast pump has a capacity of 180ml and the container is marked with a scale line. The recommended optimal amount of milk to express is 120ml. The portable breast pump sucks every drop of breast milk. Correctly measure and choose the right flange size to help breast milk flow smoothly. 2Low Noise: Innovative suction technology, with less than 55 decibels when used, will not disturb sleeping babies. Physical keys last longer and are less likely to be damaged than touch screens. The built in bra adjustment buckle helps improve the fit of the breast pump. 3Hands Free: Our breast pump is lightweight,easy to grip and no tube. Wearable breast pump is very convenient,you can pump anywhere and at anytime,enjoy the free time of breastfeeding.And the electric breast pump can USB rechargeable. 4Soft Silicone: The breast pump fittings are made of soft food grade silicone that is easy to remove and clean, while maintaining a good seal for optimal suction. Maximum suction value range: 280 ~ 300mmHg. 5Meet Different Needs: The electric breast pump has 2 modes and 5 levels. Suggestion for mode selection: massage first and then pump, imitate the way your baby feeds and optimize milk production. Ensuring each mother produces more milk in less time, giving mothers more choice and comfort. Item Type:BreastPump Material: Polypropylene Battery Type: Lithium Battery 800mAh (built in) 1 X Breast Pump 2 X Shoulder Strap Adjustment Buckle 1 X Data Cable 1 X Duckbill Valve 2 X Sealing Ring 1 X Instruction