... 2. CE & RoHS 3. Portable TD-A50 Plug-in Air Purifier Ozone GeneratorSpecifications Model No.AT50Input VoltageAC110~240VPower ... Concentration50mg/h Effective Area10~30m2Ozone Discharge StyleCeramic tubeColorWhite&black Weight274g Plug TypeEU, AU, UK, US CertificationCE, RoHS, WEEE ... of automatic mode/manual mode.3 Without chemicals or any supplies, energy conservation and environmental protection.4 Suit ...