This style is rechargeable.Double breast pump design can pump breast milk more efficiently. Including: 2 bell mouths, 2 sucking bottles, 2 covers, 2 cylinders, 2 duckbill valves, 2 hoses, 2 tees, 1 main engines .The large wide-angle fit wraps the breast, and the liquid silicone petals are gently massaged to suck out the front and rear milk, which is comfortable and painless.1-9 gear massage mode, 1-9 gear breast suction mode.