Hi , Arooxy based in Xian city ,China ,set up in 2006 ,is theleading manufacturer of portable ,light-weight,99.6% purifiedcanned oxygen for use as a supplement to enhance sports recovery,alleviate high altitude effects ,remedy hangovers and fatigue ,andotherwise promote a heightened sense of personal health and wellbeing . CE certificated ,medical device license of China ,Iso 9001 and soon .