This ozone generator is portable, easy for professional DIY use. Low power consumption, so it will help you to save power. Safe, quiet and efficient. Eliminates odors, and freshens stale air. Large Application: Dryer, dishwasher, refrigerator, electronic shoe cabinet, air purifier and so on. Working Principle: Take advantage of high voltage, use dry air or oxygen in the air as former material to produce ozone. Power Supply: Alternating Current Function: Noise: less than equal 30dB Style: Air Purifier Usage Condition: Household Input Voltage: AC220V Output Ozone: 27g Gas Feeding: Dry Air or Oxygen Ozone Generating Method: Discharge Cooling Method: Ambient Air Cooling Attention: 1.When using this ozone generator, better to use an electrical fan. and strictly forbid people working in the room with ozone in high concentration. The output high voltage is dangerous. you are strictly forbidden to contact it in any way when it is working. 2.Clean the ceramic plate with ethyl acohol every month, and use it when it fully dry. In this way, to guarantee normal ozone yield. colour:White+silver Material:ABS+metal size:Approximately 145 x 55mm Package Contents: 2 x ozone generator Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.