Multi-functional: Replace the deodorizer with traditional deodorizing charcoal, deodorizing, disinfecting, and freshness retention. USB rechargeable. Built-in 1500 mAh battery. Can be recharged with 2 hours of USB charging. It has a lifetime of a decade, non-toxic, and harmless time to use for a long time. The strong oxidation of ozone does not emit harmful substances small, compact, so you can place it anywhere in a variety of spaces.