Super compact, lightweight, and made for one handed use, the Evenflo Advanced Single Electric Breast Pump is the perfect fit for a busy breastfeeding mom. Designed to prevent milk backup and easily cleaned, the closed system makes this pump safe, convenient and efficient. With control at your fingertips, you can easily adjust the vacuum pressure and turn the pump off and on. Compact enough to throw in your diaper bag, you don't have to sacrifice quality and comfort for size. Just like the Evenflo double electric pumps, the Advanced Single Electric Breast Pump accommodates a variety of sizes and shapes with the Evenflo AdvancedFit flange system. Plus, this breast pump works with the Evenflo Advanced Milk Storage Bag Adapters, allowing you to store milk faster and reduce milk loss when transferring from collection bottle to storage bag. Perfect for on-the-go, this pump can be powered by the provided AC adapter or 3 AA brand name batteries (batteries sold separately), so you never miss a pumping session when you are away from an outlet.