Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04

Comparison of NT-02/G3/NT-01(Mobile users, please swipe the chart below left and right to view the comparison details) Model &Features Model NT-02 Inogen One G3 NT-01 Price $ 999   $ 2495  $ 549 Oxygen Concentration  93%±3  90% - 3% /+ 6%  93%±3% Adjustable Flow  1-5L  1-5L   1-5L Operation Mode  Dual Oxygen Mode  Pulse flow  Pulse flow Weight 4.85 Pounds  4.9 Pounds  7.05 Pounds Timing function  √  □ √  Charging time  4-8 H  4-5 H  4-8 H   Replaceable battery  √  √ □ Replaceable battery price $169  $407  □ NT-02 HighlightsDual mode: Pulse dose + Release Oxygen Every 3 Seconds 93% ± 3% Oxygen Concentration 3-4 Hours Long Battery Lasting( Click here to get extra batteries)Replaceable Battery (Don't need battery charger)Only 4.85Lb Lightweight Full Sets of AccessoriesFree Versatile Bag Three Different Charging OptionsAC Power Supply- Home/Hotel/ Office/ I