Hygeia EnJoye-EXT is FDA Approved to be used by more than 1 user. EXT can be plugged in or used with it's external battery pack that uses 8 AA batteries. Proven performance for working moms with long-term and frequent pumping needs. Green Breastpump--Can be shared & recyled. Customizable speed and pressure controls. Stylish Black Microfiber Bag w/ Storage Space.