Wireless and Travel Friendly. Advanced rhythmic design mimics a baby's natural sucking behavior so you can safely release more milk, fast and consistently. Cushioned silicone breast shield maximizes comfort and prevents leakage. BPA free nipples are soft and natural. IMPROVES MILK FLOW – Advanced rhythmic design mimics a baby's natural sucking behavior so you can safely release more milk, faster and consistently DISCREET & QUIET – Featuring a whisper quiet motor and rechargeable lithium battery, this lightweight breast pump and milk bottles are travel-friendly PUMP WHILE FEEDING – Convert device into single pump by simply closing the second loop to pump your other breast while baby is feeding DUAL MODE TECHNOLOGY – Select between 20 fast or slow pumping patterns to change suction power and milk flow based on your comfort or time available COMFORTABLE & FLEXIBLE – Cushioned silicone breast shield maximizes comfort and prevents leakage, while BPA-free nipples feel soft and natural.