Price Reduction Oxygen Generator for Dogs and Cats, 30%-90% Concentration

My cat became unwell and I urgently purchased this, but they recovered in about 5 days, so I'm selling it to someone who needs it.
The cage is M size (10th photo). I assembled it, but my cat wouldn't go in (due to oral suction with a pet bottle). The oxygen concentration meter is unused. This set is a better deal than renting!
For those in a hurry, I will ship as soon as possible, ideally the same day (depending on purchase time). All items have been tested and are working.
All tubes and accessories for human use are included (unused). Please comment if you are interested in purchasing items separately.
The oxygen generator alone is available for ￥23,000. The cage is ￥5,980, and the meter is ￥19,800.