The portable oxygen generator uses the principle of pressure change adsorption, air as raw material, and zeolite molecular sieve as adsorbent to separate oxygen from other gases such as nitrogen in the air. At normal temperature and pressure, high-concentration oxygen can be continuously separated from the air by powering on. Product name: oxygen concentrator Specifications: fully intelligent version, automatic power-off protection Size: 13.39*7.09*12.21 inches Applicable area: 21-30m2 Style: oxygen therapy Purpose: 10-20m3 Ambient temperature: 0-40 Atmospheric pressure range: 96-106kpa Air volume: 51-150m3/h Oxygen concentration (%): 2L Machine, oxygen concentration above 90%, large oxygen flow Net weight: 14.33 pounds Rated power (W): 130W Applicable voltage: AC220V Function: 1: Negative ion function, 6 million per cubic meter 2: Timing function up to 180 minutes 3: Power saving mode 4: Sleep mode