Simply go portable O2 concentrator

 Oxygen concentrations87 to 96% at all settings

Pulse mode bolus size:1=12 ml, 1.5=18 ml, 2=24 ml, 2.5=30 ml, 3=36 ml, 3.5=42 ml, 4=48 ml, 4.5=54 ml, 5=60 ml, 5.5=66 ml, 6=72 ml

Continuous flow settings :

0.5 LPM, 1 LPM, 1.5 LPM, 2 LPM

Sound level:≤ 43 dB at pulse setting 2

Size:11.5 in x 10 in x 6 

Weight10 lbs (4.5 kg) wit