Features:  1. Styled design, selected material, compact structure, simplified ear-phone shaped oxygen.  2. Mild airflow supplied for a harmonious atmosphere.  3. Advanced technology incorporated for precise oxygen concentration control to 28+/-2% for rich oxygen achievement.  4. Simplified concise control system with intensive design under the control of only 1 knob.  5. International standard adapter (100-240v) safely withstands serious change of power pressure and frequency.  6. Furnished with chargeable battery can be used at home, in a car and even the place without power supply.  7. Direct Currency and brushless motor ensuring quiet running and economical power consumption. Vector frequency conversion bringing powerful driving. Specification:  Condition: 100% Brand New  Item Type: Oxygen Generator Material: ABS Oxygen concentration: 29% ± 2% Rated voltage: AC100V-240V / DC12V-16.8V Air flow: About 3L/min Oxygen supply: Directly supply  Power: 32W Noise: ≤48dB Application ambient temperature: 5~40°C Humidity: less than 90% RH Storage ambient temperature: 0~40°C Humidity: less than 80% RH Size: Approx.10 * 24 * 14.6cm / 3.9 * 9.4 * 5.7in Package List:  1 * Main Machine  1 * Portable Bag  1 * Car Power Cord 1 * Adapter 1 * Battery Charger  1 * Nasal Oxygen Tube 1 * Lithium Battery 1 * Manual 
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