?Features: - Use of unilateral or double pumping, easy to install, disassemble and change. - 9 levels of each mode (sucking/massage) can be set freely. - Odorless PP and safe silicone material, BPA free. - 180-degree rotation with petal-type massage cushion gives mothers a soft and comfortable effect when suckling babies, gently stimulates mothers' breast milk flow. - Anti-back flow system prevents the milk from getting into the controller and keeps the milk clean. - Level indicator with flashing lights shows the gear that a breast pump is running. - Ultra quiet operation with LED screen and touch-sensitive buttons. - Lithium Battery inside with easily chargerd ?Usage Methods: Please wash hands before install and use it. Please use boiling water to clean and disinfect before or after using it for 1 - 3 minutes. Use cotton balls soaked with hot water to heat the nipple and mammary aureole first. Be relax and sit comfortably. Place the breast pump on your breast so that your nipple is properly centered in the tunnel. Press the power switch, select the sucking/massage mode and adjust the level from 1 to 12 according to your need. ?Tips: Stop using if you feel painful. The postpartum mother should be used under the guidance of a doctor or professional nurse. 80 percent of the bottle volume is enough, it is suggested to use continuously less than 30 minutes per time. Do not mix up fresh milk with frozen milk. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.