Philips Avent Double Electric Breast Pump Advanced, with Natural Motion technology Fast and incredibly convenient Inspired by baby’s unique combination of suckling and massage, Natural Motion technology powerfully combines suction and nipple stimulation for quick letdown and milk flow. Soft silicone flange that adapts to fit both size and shape of the breast. Includes a pumping belt to hold the pump, rechargeable battery, and travel bag so you can now pump wherever life takes you. Personalize by choosing from 8 stimulation and 16 expression levels. For ease of use, the pump remembers your settings for your next expression session. Closed system for hygienic expression, no milk in the tubing. Few parts for easy set up, use, and cleaning. Quiet motor, for a discreet experience. Pump display is easy to read with a timer to track each session. Pause and start buttons, to adjust during the session. Designed for upright pumping, thanks to the no-lean forward design. Rechargeable battery Battery type: Li-Ion 3.6 V 2600 mah (non-replaceable) Operating time: up to 3 pumping sessions Charging time: up to 4 hours (full charge) Model: SCF394/62.