... 4-1 year free warranty 75W portable oxygen machine for skin care-factory manufactured2-CE,PSE,ISO90013-acne,scar removal4 ... of the chemical plating.A: Respiratory system----rhinitis, faucitis, catchcold,etc.;B: Neural system----neurasthenic, insomnia, migraine, etc.;C: ... Blood----leucopenia;D:Digestive system----coprostasis, the disorder of the gastrointestinal unction;E: ...