This generator is portable, easy for professional DIY use. Low power consumption, so it 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 . Power Supply: Alternating Current Function: Noise: less than equal 30dB Style: Air Purifier Usage Condition: Household Input Voltage: AC220V Output : 27g Gas Feeding: Dry Air or Oxygen Generating Method: Discharge Cooling Method: Ambient Air Cooling Attention: 1.When using this generator, better to use an electrical fan. and strictly forbid people working in the room with 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 normal yield. colour: White+silver Material: ABS+metal size: Approximately 145 x 55mm Package Contents: 4 x generator Only the above package content, other products are not included. Note: Light reflection 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.