portable oxygen concentrator battery life/portable oxygen apparatus with battery/mini oxygen breathing apparatus

State-of-the-arts design and 10 functions **Efficient oxygen supply **Concise film button, simplified operating procedure **Portable and light **Energy efficient, Economical Consumption **Convenient earphone breathing apparatus **Low noise, mute motor, physical oxygen generation **Safely broad-spectrum, oxygen concentration satisfying varied demands **Ergonomic Design, harmonious airflow **Standard parts: worldwide voltage adapter