The Panasonic replacement smoke filter is used to eliminate normal atmospheric contaminants and promotes normal viewing with your projector. As its name suggests, this filter prevents smoke and fog from entering the projector. The filter increases the projector's resistance in smoky concert halls, allowing it to display the best possible images. The filter can be used continuously for 24 hours, enabling rental companies to save time and money. - Compatible with the ET-SFE16 projector