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. 2. Product Name: Oxygen Machine 3. Specification: Fully intelligent version, automatic power - off protection. 4. Size: 13.39 * 7.09 * 12.21 inches. 5. Coverage area: 30m. 6. Style: oxygen therapy. 7. Application: 10 - 20m. 8. Ambient temperature: 0 - 40 C. 9. Atmospheric pressure range: 96 - 106 kPa. 10. Air volume: 51 - 150 m/h. 11. Oxygen concentration (%): oxygen concentration above 90%, high oxygen flow. 12. Product net weight: 14.33 pounds. 13. Rated power (W): 130 W. 14. Applicable voltage: AC220V. 15. Functions: - Negative ions: 6 million per cubic meter. - Timing function up to 180 min. - Energy saving mode. - Sleep mode.