Feature: 1. Painless Pumping: Wearable electric breast pump, efficient emptying, painless pumping, and smooth milk delivery. High frequency micro vibration accelerates lactation. 2. Air Pressure Pulse Pump: Piston cyclic movement. Double frequency conversion technology, massage to unblock the breast. Low vibration and low noise, do not disturb the baby's sleep. 3. Anti Backflow Design: Double channel anti backflow design, air and milk separation, prevent breast milk from overflowing, clean and pollution free. 4. 9 Gears Adjustable Suction: Simulating the baby's sucking rhythm, 3 working modes, includes prolactin mode, massage mode and pumping mode, suitable for women lactation frequency, comfortable to use. 5. Rechargeable Design: 1200mAh large capacity lithium battery, USB charging design, multiple power supply mode. Adopts silicone, PP and ABS material, stable and durable. Specification: Item Type: Wearable Breast Pump Material: Silicone, PP, ABS Host Size: Approx. 110 x 55mm / 4.3 x 2.2in Breast Pump Size: Approx. 110 x 110mm / 4.3 x 4.3in Battery: Lithium Battery 1200mAh (Built In). Package List: 2 x Bra Adjustment Buckle1 x USB Cable2 x Breast Pump1 x Manual3 x Hose1 x Host Note: Please allow slight error due to manual measurement. Thanks for your understanding.