Hi I'm selling this Inogen 1 G4 Portable Oxygen Machine. We had it 4 months and only used it roughly 4 times . We payed $2,500.00 . We are asking 1,800.00 for it. It comes with a home charger, car charger, carring case a fresh never been used nose piece and 1 battery the lasts about 34 hrs on 1 charge . It's really handy and lightw8 if you need oxygen all the time . call or text with any questions {contact info removed}