Oxygen concentrator: Apply zeolite molecular sieve as shift, adopt advanced physical theory(PSA) to separate oxygen and nitrogen in air, at the same time filter the bad subtance in air, so as to get pure oxygen for medical use.

7F-3 technical data:

Power supply: AC220+/-22V, 50+/-1Hz
Input power: ≤ 350VA
Oxygen concentration: ≥ 93+/-3%
Oxygen flow: 1-3L/min
Output pressure: 0.04-0.05MPa
Oxygen temperature: Room temperature
Operation noise: ≤ 60dB(A)

And we have another 5 model of this machine, will show you on demond.