Hospital grade pump with closed system and powerful suction great for full time or part time pumping. Has on board battery and charges with USB-C. Can be used whole plugged in. Great for moving around and not being tied to the wall. Used 1 or 2 times so like new and lots of hours left on the motor. Has an app to use thru your phone to run the pump and save your pumping routine on. Comes with silicone flange(21mm and 24mm)system to help reduce friction on breasts and reduce pain. Bought new by me and used a few times.