Bests & Worsts Reviews from Amazon

Buried in the Safety Information but not showing in the online description is this line:"DO NOT use this monitor in oxygen rich environments or near flammable gas."For this reason, I'm sending it back.Anyone know why this warning exists with this product? I don't think its related to the lithium ion battery because they make portable oxygen concentrators that are powered by lithium ion batteries.To the manufacturer:Please explain the danger of using this in the presence of oxygen. Please change the description in your Amazon ad to warn oxygen users not to use this product before someone gets toasted.