The O2 Concepts OxLife Independence is a FAA Approved Portable Oxygen Concentrator. It delivers both Pulse Delivery & Continuous Flow. Pulse settings 1-6. Continuous Flow settings 1-3.

Weight: 14.85 lb
Dims: 8″ x 8″ x 12″
Battery Duration
Pulse Delivery:
Setting .5: 3 hr 8 min Each Battery / 6 hr 15 min with 2nd Battery
Setting 1: 3 hr Each Battery / 8 hr with 2nd Battery
Setting 2: 2 hr 53 min Each Battery / 5 hr 45 min with 2nd Battery
Setting 3: 2 hr Each Battery / 4 hr with 2nd Battery
Setting 4: 1 hr 30 min Each Battery / 3 hr with 2nd Battery
Setting 5: 1 hr 8 min Each Battery / 2 hr 15 min with 2nd Battery
Setting 6: 53 min Each Battery / 1 hr 45 min with 2nd Battery
Continuous Flow
Setting .5: 2 hr 53 min Each Battery / 5 hr 45 min with 2nd Battery
Setting 1: 2 hr 38 min Each Battery / 5 hr 15 min with 2nd Battery
Setting 2: 1 hr 15 min Each Battery / 2 hr 30 min with 2nd Battery
picture from http://www.o2-concepts.com/