01. Built-in negative (oxygen) ion generator, Ozone combination of anion sterilization perfect, anion not only has the effect on falling dust, sterilizing, purified air, but also good for your health.Reduce the hazards of passive smoking more effectively. 02.Use DC low noise centrifugal fan; 03.Use high-quality enamel casting tube, the ozone purity, stability, longe-lived; 04. Use epoxy resin, vacuum packaging high-voltage module, resistant to moisture, earthquake, maintenance-free; 05. Modular with plug-in design, easy maintenance, reliability; 06.Use Ozone-specific air pump, longe-lived and good stability; 07.Origin ABS engineering plastic, high hardness; 08.3C certification standard power cord; 09. Three colors of the aeration stones of different shapes to meet different application requirements, more humanization; 10.Two different colors of the trachea, easy to distinguish, more health; 11. Small space, water, gas dual-use, simple operation, can be standing or hanging, is more practical; 12.Microcomputer control, time digital display, more convenient; 13.Humanization design, leading the fashion. &n