ANGELBISS, The first one to make out the world’s first battery operated 5LPM Oxygen Concentrator
Rechargeable, 5L Oxygen Concentrator (AC, DC, Batteries)

It even produce 93% purity O2 at 5L/min flow
Oxygen Purity in flow:
≥95.0% @ 1 LPM
≥94.5% @ 2 LPM
≥94.0% @ 3 LPM
≥93.5% @ 4 LPM
≥93.0% @ 5 LPM

Special Features only provided by AngelBiss Technology
The world’s first battery operated 5LPM@93% Oxygen Concentrator
The world’s NO. 1 Oxygen Output Purity Fluctuation rate controlled within 0.1%.
Automatic heavy humidity remove molecular sieve
Independent Oxygen outlet & nebulizer outlet system
Child Lock settings
Intended Use for: 
The product can be used on the occasions such as:
1 - on a driving ambulance,
2-  copd patients need to transit between home and hospital,
3-  copd patients need to transit between different hopsital sections,
4-  for rooms prohibited oxygen cylinders,
5-  other places that can represent as traditional oxygen cylinders,
6-  and those places have poor electricity conditions.