1.Certification:CE, ISO9001 2.O3 output percent: 20% to 100%, Adjustable 3.Two-way timed timing 4.One year warranty for free 1.Product features: a. Sterilization: can quickly kill all sorts of bacteria, viruses, and no secondary pollution. b. Detoxification: effectively remove residual pesticide in food. c. Deodorant: purify mildew flavour, smoke, etc. Various kinds of stink. d. Add oxygen: ...