OSITO Portable Machine with Adjustable Concentrator Flow 1L/min-5L/min Purity 30%-90%

[oxy concentration] 1-5L adjustable, Flow rate 1 L concentration 90% ± 2%, flow rate 2 L concentration 78% ± 2%, flow rate 3 L to 4 L concentration 50% ± 3%, flow rate 5 L concentration 30% ±...