What's the use of Omron 3L oxygen generator? I want to buy one for my parents during the Spring Festival.

Omron 3 L oxygen generator is mainly used by patients to absorb oxygen, which belongs to medical use. If it is used, it is written on the product material: use imported high-efficiency sieve to monitor and display the oxygen concentration in real time, so as to accurately grasp the oxygen concentration before mastering it. The amount of oxygen can be adjusted, and the highest oxygen concentration can reach 3 L. At 3 L, the oxygen concentration can reach more than 9 0%, and the oxygen supply is stable. In addition, it is specially equipped with atomization function, and the static sound and light are convenient to design. In addition, Omron 3 L oxygen generator has five intelligent alarms: oxygen concentration alarm, low pressure alarm, high pressure alarm, low temperature alarm and high temperature alarm, so as to display the function and ensure the safety of use. If it is for my parents, I feel very comfortable. When people get old, the symptoms of cough and wheezing are frequent. Buying one can relieve this symptom and also has the effect of atomization. For example, my parents have lung disease, so be strong and safe!