Oxy's Compact High-Concentration Oxygen Generator

The items shown in the photos are all that is included.
The box is not included.

The power of high-concentration oxygen inhalation to improve blood flow is said to have the following six benefits:
1. Early recovery from fatigue
2. Dieting
3. Beautiful skin
4. Increased body temperature and improved immunity
5. Prevention and early recovery support for hangovers
6. Promotion of improved memory and concentration

I do not have specialized knowledge, so I cannot answer your questions.
As this is a used item, please refrain from complaints or returns.