Kobe Medicare Oxygen Concentrator M1O2-C5L. Purchased in October 2021. Stored at home unopened. Unused. Please note that this is not a new item. The cardboard box was opened for photography and content confirmation. Shipping will be in the original cardboard box and packing materials, and is planned to be 160 size. **The one-year product warranty has expired.** ◯ Product Details ◯ ・Product Name: Oxygen Concentrator M1O2-C5L ・Power Supply: AC100V 50/60Hz Power Consumption: 300W ・Oxygen Concentration Method: PSA (Pressure Swing Adsorption) ※Two large zeolite towers ・Oxygen Concentration: ・1L～5L: 93% (±3%) ・5L～8L: 93% (±3%)～70% (±3%) Flow Rate: 1～8L/min, Flow Rate Adjustable ※Oxygen concentration is constant from 1 to 5L. It varies from 5L. ・Operating Noise: Approximately 45dB ・Weight: Approximately 21kg ・Size: 270(W) x 490(D) x 560(H) mm ・Timer: 0～120 minutes setting / Continuous operation mode without timer setting: 24 hours (1440 minutes) ・Warranty Period: ※Warranty period has expired ◯ Included Parts (Included) ・Main unit ・Inhaler / Headset (with water trap bottle) x 2 ・Cannula (tube for direct nasal inhalation) ・Distribution joint (Y-shaped, for simultaneous use by two people, etc.) ・External air intake filter ・Cylindrical filter ・Instruction manual and warranty card ◯ Functions: Main unit: Discharge flow meter, flow rate adjustment knob, indicator lamp, large humidifier bottle, timer Inhaler: 2-stage flow rate adjustment (strong/weak), cannula, water spray prevention, handle, With 4-wheel casters Retail Price: ¥416,000 This product is a health device. It is not a medical device as defined by the Pharmaceutical Affairs Law. ※We cannot answer questions regarding the product, such as specifications and performance. Please check the product details and the seller's website. ※※Although unused, please understand that this is not a new item. We will accept no returns or exchanges. In the event that a return is necessary, the buyer will be responsible for return shipping costs and listing fees. After confirming the product after the return, if there are no problems, the amount will be refunded after deducting various expenses.