Medical oxygen concentrator

on castersportable

Oxygen flow at gear 1~5 is pulse mode, when inhales, it wil provide oxygen , but stores oxygen when the user exhales. *Lightweight: Total weight of the whole machine including battery is only 1.98kg. *Longer duration time of battery is up to 4.5 hours, and an additional battery can be provide for backup. *High Alititude: available for mountain climbing, After actual testing, this machine can be used at an altitude of 4680 meters. *Pure: High oxygen concentration, ensure more than 90% oxygen concentration at 1-5 gear, meet medical-grade