This set is offered irregularly, and only a few are left. There are no plans to relist it after it sells out. This is a pet oxygen chamber. It's the spacious M size. If you're in a hurry, we may be able to ship it the same day, depending on the time. This model can operate full-time, 24 hours a day. It's a high-end model with an oxygen concentration of over 90%. It comes with instructions, an hour meter, and is new with 0 operating hours. The LCD display works, and it has been confirmed to operate normally with a combustion test. *Please be aware that some devices claim to be oxygen generators but do not actually produce oxygen.* *Occasionally, the oxygen machine may be a different model number from the same manufacturer.* The Oxi-Hotel is a new, unused M size. S size is also available. "Pet Oxi Hotel" is made with safe and carefully selected materials. It was developed for delicate pets. It works in conjunction with an oxygen generator that creates high-concentration oxygen from the air to help your pet breathe. *Additional information: The hotel in the first image is S size, but the actual item is the M size hotel and oxygen machine shown in the second and subsequent images. The oxygen machine is also a different series from the same manufacturer as the one in the first image, as shown in the second and subsequent images. Please be aware of this before purchasing.* *Please note that comments from those who are not intending to purchase or are just gathering information will be deleted at any time.*