Purchased new in December 2025. Used for approximately 1.5 days and is in excellent condition. Please refer to the photos for details. The water bottle is completely unused. The oxygen chamber is size S, and has been wiped with alcohol inside and out, but please refrain from purchasing if you are concerned. The warranty period is one year from 2025.9.18, as stated in photo 15. I believe those viewing this listing are eager to receive it quickly, so I will ship it as soon as possible. Please note that the shipping location may vary if the shipment falls during the year-end and New Year holidays. ※ In photo 3, the securing strap that was attached to prevent shifting when it arrived could not be completely cut off and remains attached. It did not affect usage. ◾️ From the product page: Product Name: High-Performance Oxygen Concentrator MAFmini 1.0 Model Number: Nevoton MAF MINI 1.0 Size: 302 x 168 x 325mm Weight: 5.2kg Oxygen Concentration: 30-90% ± 3% (1L/min) ※ Maximum concentration of 90% at an airflow of 1L/min or less, minimum concentration of 30% at 3L/min Noise Level: 48dB or less Continuous Operating Time: Over 5,000 hours! Safe design with automatic shut-off in case of internal overheating (Note). Note 1) Please avoid using it near walls where air convection is difficult, or on highly insulated carpets as much as possible. Note 2) If the above is difficult, please use an air circulator such as a fan to circulate the air. Zeolite Durability (Estimate): 3000 hours Oxygen Concentration Method: PSA method Power Consumption: 95W Airflow Pressure: 100KPA or less Accessories: Remote control, tube, replacement filter, replacement water bottle Warranty Period: 1 year Country of Manufacture: Made in China, inspected and shipped in Japan