3, small, lightweight, easy to use, is a portable oxygen bar, altitude hypoxia can increase the oxygen content in the air to ease breathing difficulties. Does not produce electromagnetic pollution, safe and reliable, without negative effects on the human body.
4, has a high cost, long life. Charging time can work for 15 hours, charge and discharge up to 500 times.
5, not only to adapt in a relatively quiescent state, but also adapted to the relative motion, at any time to eliminate sudden infection.

Application: hospitals, schools, chemical, densely populated train, train station, car, bus, boat docks, supermarkets, shopping malls the high plateau of thin air (which can alleviate the phenomenon of high altitude) and so on.
Due to global warming, all kinds of plague, the virus frequently, we should improve the "self-protection and preventive measures," the sense there should not be left to chance, so as not to regret! !

Wanted domestic and foreign agents. Schools and hospitals, group purchase price. Welcome to order.