1. Home oxygen concentrator, suitable for all kinds of people.
2. Supply continuous flow 1-7L/min adjustable. 3. 1L 90%; 2L 65%; 3L 55%; 4L50%;5L 40%; 6L 35%;7L 30% 4. Two people can simultaneously absorb oxygen. 5. Intelligent time accumulation function 6. Small size for easy to ship and carry.