This is a medical device which is electrically powered by pump unit. Aircraft units are used to extort oxygen from the international air. Through a Hudson mask which is a disposable medical mask the oxygen is transported to you or by lightweight nasal prongs which allows you to talk and eat while on oxygen. The device doesn't supply oxygen continuously instead it uses a pulse-dose delivery system which senses your breathing and electronically generates oxygen for first path of breath. This is the most significant part of breath that maintains oxygen level in your lungs.
