Used for about a month after being purchased new. Will be shipped with air cushion (bubble wrap) packaging. ■Product Features■ 【Manufacturer】UNICOM 【Product Model Number】Oxyvenus Mini 1000 【Price including tax】82,830 yen (75,300 yen excluding tax) 【Product Specifications】●Power supply: Car/Household 100V ●Operating noise: 45db ●Oxygen generation method: PSA ●Oxygen concentration: Approximately 90% to 30% ●Flow rate per minute: Approximately 1 liter to 4 liters ●Power consumption: 90W ●Size: w199 x D320 x H324 (mm) ●Weight: 6kg 【Accessories】●Power cord: 1 ●Cannula: 1 ●Connection tube: 1 ●Headset: 1 ●External filter: 1 ●Internal filter: 1 ●Inverter: 1 ●Instruction manual: 1