The compact USB rechargeable pump fits in the palm of your hand or in the pocket so it doesn’t weigh on the breast. This light and portable double breast pump is easy to carry wherever you go. It weighs less than 10 oz and is small enough to fit into your palm, pocket or bag. Made for comfortable and efficient milk expression, the pump comes with a built-in rechargeable battery that lasts for up to eight double-pumping sessions from a full charge (so you don’t have to plug in while expressing). And if you need to recharge on the go, Freestyle Flex has a USB port. All Medela electric breast pumps are designed with a 2-phase expression that mimics baby’s sucking rhythm—fast to stimulate milk flow, then slower to feed. *Includes pump ONLY. *Pump is new in box from Medela and never used.