The BlueAir BCST1620 contains the following:
The BlueAir 16x20x1 High Efficiency Air Filter Kit turns your air conditioning or heating system into a sophisticated, high efficiency air purifier system. The filters in this BlueAir filter kit capture over 90% of airborne contaminants and up to 99% of the smallest particles. The particle charger in this BlueAir particle filter kit negatively charges airborne particles so that they will be attracted to the filter. The timer in this high efficiency air filter kit lets you know when it's time to replace your filter.
The BlueAir BCST1620 specifications: