The AirTamer A310 is a high performance rechargeable personal or travel air purifier. AirTamer's advanced, patented ionic technology emits a constant stream of healthy negative ions that force airborne pollutants away from your personal space giving off a 3-foot radius of cleaner and safer air in every direction. The A310 is a pollutant eliminator, through its emission of negative ions it removes particles from the air often left behind by other types of purifiers (like HEPA filters). It is silent in operation and extremely energy efficient. A single charge from the USB cable (included in your purchase) provides over 150 hours of run time with power boost technology.