S12 Double Electric Wearable Breast Pump With 2 Modes & 9 Levels Suction Adjustable, S12 Double1. Capacity: 180ml 2. Material: PP 3. Weight: 650g 4. Host size: approximately 63x160x70 mm 5. Dual rhythm breast pumping mode, simulating the babys natural sucking 6. Skin friendly liquid silicone, fits the breast in all directions without displacement 7. Dual channel anti backflow design, charging at any time, suitable for home and outings 8. LCD display, simple operation, breast pumping timing display breast pumping mode display 9. 9 gears,