... oxygen purity, stability, longe-lived; 02. Use epoxy resin, vacuum packaging high-voltage module, resistant to moisture, ... to distinguish, more health; 09.Small space, water, gas dual-use, simple operation, can be ... indoor air is often dramatically more polluted than outdoor air. The EPA (Environmental Protection Agency) and ... ! NEW TYPE MINI PORTABLE PLASTIC OUTDOOR WATER PURIFIER / WATER FILTER