Model NT-03 :
Oxygen Flow: 3L/min stable flow (not adjustable)
Oxygen Concentration: stable 32.5±2.5% oxygen concentration
Oxygen production method: pressure swing adsorption separation method (PSA method)
Noise: ≤45 Db(A)
Item Weight: 3.1 Pounds (1.4KG)
Package Size: inches (20.5*9.5*13cm)
Work rate: 30W
Input voltage: DC12V~16. 8V
Working time: 40 minutes, 60 minutes, 80 minutes, 180 minutes (adjustable)
Battery of NT-03:
Come with the NT-03 portable oxygen concentrator
Battery Lasting: last for 1-3 hours
Standard battery pack capacity: 2500mAH 14.8V,the highest voltage is 16.8V