Lischwert 2-in-1,7L Adjustable Generator- oxyegen-Tube Quiet(All-Age Use) Concentrator de oxigeno 1-7L Continuous for Home use

Specifications: Color: White 1~7 L/min Adjustable 90% (1 L/min), 65% (2 L/min), 55% (3 L/min), 45% (4 L/min), 40% (5 L/min), 35% (6 L/min), 30% (7 L/min) Noise: ≤48dBYou may also like Lischwert 3.3lbs Por/table with full part 3L-Oxygen Machine-Ac adapter for travel&home use 33% concentracion.