FEATURES: 1. 30% concentration rich oxygen supply; this data is medically well known to be the healthiest to human. 2. It adopt membrane oxygen enrichment method, it works under normal atmospheric pressure, don¡¯t need compressor. More safely working. 3. Compact and simple structure, no need to rearrange the room around it. 4. Lightweight, small and easy to move, this is the perfect home and automotive concentrator, .and you can take it wherever you want. 5. Elegant styled design, good looks make it very popular with most people. 6. Simple control panel, it is very easy to use and no need to learn how to operate several devices 7. Don¡¯t need maintain any components, low noise and low power consumption. 8. Free from risk, germs, bacteria, virus and dust are not penetrable through the membrane. 9. With automatic clean system, it can automatically clean the vapor and remnant o2 before stop working every time, so the bacteria and virus can not survive, guarantee the fresh oxygen supply in the next time. SPECIFICATIONS: - Oxygen Supply: 3 liters per min - Oxygen concentration: 30 %¡À2% - Method: oxygen enrichment membrane - Inhalation method: headset - Timer: 10, 20, 30 min - Size: 210L x110W x300H mm - Power: AC 220v, 50HZ - Weight: 3.5 kg - Sounds: < 40db - Power Consumption: 33W