All Out Ultra Power+ Floral fragrance refill kills mosquitoes, including those that may carry Dengue. It can be used with All Out Ultra Power+ Slider or Fan Machine. Together, they provide convenient mosquito protection that can be controlled between low to high mode, depending on the intensity of mosquitoes. Once plugged in, it does not need to be replaced daily. Leaves a fresh, floral scent. See the label for detailed precautions and usage directions.