①. The portable oxygen concentrator uses the principle of pressure swing adsorption. Air is used as the raw material. Zeolite molecular sieves are used as adsorbents to separate oxygen in the air from other gases such as nitrogen. Under normal temperature and pressure, a high concentration of oxygen can be continuously separated from the air when the power is turned on.<br> ②. Product Name: Oxygen Machine<br> ③. Specification: Fully intelligent version, automatic power - off protection.<br> ④. Size: 13.39 * 7.09 * 12.21 inches.<br> ⑤. Application space: 30m².<br> ⑥. Style: oxygen therapy.<br> ⑦. Application volume: 10 - 20m³.<br> ⑧. Ambient temperature: 0 - 40 °C.<br> ⑨. Atmospheric pressure range: 96 - 106 kPa.<br> ⑩. Air volume: 51 - 150 m³/h<br> ⑪. Oxygen concentration (%): oxygen concentration above 90%, high oxygen flow<br> ⑫. Product net weight: 14.33 pounds<br> ⑬. Rated power (W): 130 W<br> ⑭. Applicable voltage: AC220V<br> ⑮. Functions:<br> - negative 6 million per cubic meter;<br> - Timing function up to 180 min;<br> - energy saving mode;<br> - sleep modeProduct Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.