1. Flow Range: 0.5~5L/min (7F-5) ;0.5~8L/min (7F-8) ; 0.5~10L/min (7F-10)
2. Oxygen Concentration: 95.5%~87%
3. Maximum Outlet Pressure: 45kPa±4.5kPa (6.52psi±0.65psi) (7F-5)
    Maximum Outlet Pressure: 45kPa±4.5kPa (6.52psi±0.65psi) (7F-8)
    Maximum Outlet Pressure: 62kPa±4.5kPa (8.99psi±0.65psi) (7F-10)
4. Pressure Relief Mechanism Operational at: 250kPa±25kPa (36.25psi±3.63psi)
5. Altitude: Up to 1828 meters (6000 ft) above sea level without degradation of concentration levels.
                     From 1828 meters (6000 ft) to 4000meters (13129 ft) below 90% efficiency. (7F-5)
     Altitude: Up to 1230 meters (4000 ft) above sea level without degradation of concentration levels.
                     From 1230 meters (4000 ft) to 4000meters (13129 ft) below 90% efficiency. (7F-8,7F-10)
6. Sound Level: ≤60dB(A)
7. Maximum nebulizing rate (apply in the oxygen concentrators having the function of nebulizing): ≥0.2 mL/min
8. Power Supply: AC120V±10% AC220V±10% AC230V±10% 50Hz 60Hz
                                 4.6amps(AC120V);2.2amps(AC220V~240V) (7F-5,7F-8)
                                 8.5amps(AC120V);4amps(AC220V~240V) (7F-10)
9. Input Power: ≤600VA (7F-5,7F-8) ≤1000VA (7F-10)
10. Weight: 26kg (57.31bs) (7F-5) 27.5kg (60.62bs) (7F-8) 32.5kg (71.65bs) (7F-10)
11. Dimension: H44.5cm (17.5″) ×W37.2cm(14.7″)×D68cm(26.8″)
12. Minimum Operating Time: 30minutes