Pet Oxygen Generator - Includes Instruction Manual, Minor Scratches A4 Size - Included: Instruction Manual - Included: Power Adapter - Included: Tubing - Condition: Minor scratches Thank you for viewing. Purchased on Yahoo Shopping in June of last year for ¥17495. Used for about 2 months during the day. The sound is quite loud, which may bother some people. I put the machine in a glass shelf and covered it with towels and cardboard to soundproof it. All the parts in the photos are included. The amount of oxygen can be felt by holding your hand near it, so if you are concerned, I recommend a medical-grade one. It automatically stops after 20 minutes, so you need to press the power button again to continue using it. Shipping costs apply, so price reduction is not possible. m(_ _)m Thank you.