Like brand new CAIRE Freestyle Comfort Oxygen Concentrator less then 30min of use. Perfect in every way. All parts and accessories that came with it are included. It retails brand new for close to 4,000$. This is the best deal ever. Available to sell asap. I have no problem if you want to check and inspect it. it's in perfect like new working order. Any questions or interested I will reply promptly to all messages.