Sharp IG-BC2UB High Density Plasmacluster Ion Generator for Car Use: * Simple 1-touch operation * 2 fan speeds * Library quiet (silent mode is only 28 dB) * Long-life ion engine (up to 19,000 hours use without performance decrease) * Washable micro-mesh filter traps dust, dirt and other airborne particles * 6 years average filter life * Energy efficient * Complies with California ARB Standards for Ozone Emission levels