... one 3, CE and ROHS approved 20g portable ozone machine for hotel with CEFeature:1 Outer case is made of the corrosion ... mobile, conveniently to be used, flexible, and can be sterilized in a variety of target sites and many other advantages of ... ozone at high concentrations, a more thorough disinfection and sterilization, long-life design4 air-source and oxygen source one machine, the customer ...