Feature:1. Air optimizer, using international advanced technology, using air as material, continuous oxygen production (34 hours endurance).2. Compact in size (weight and volume equal to about 2 bottles of mineral water), suitable for home use, traveling use and car use.3. The output gas is moist, cleaning and no residue, energy saving and low consumption, cleaingn and environmental friendly, safe and dependable, long service life.4. Can alleviate the series of different symptoms caused by hypoxia.5. Suitable for high altitude anoxic areas, field travel and health care.Specification:Item Type: Oxygen GeneratorMaterial: ABSPower: 25WSize: Approx. 13585195mm / 5.3 x 3.3 x 7.7inPressure: 50kpa_106kpaEnvironment Temperature: 5-40Oxygen Flowing Rate: 3L/MinOxygen Concentration: 30% 2Noise: 50dB(A).Package List:1 x Host 1 x Manual 1 x Plug1 x Supply Cord1 x Breathing Tube (White) 1 x Oxygen Tube1 x Nasal Plug (Blue) 1 x Storage Bag