The Zero In 90-Day Knockdown Flying Insect Killer is a discreet, adjustable release unit designed to kill and repel flying insects in the home. It lasts up to 90 days and features a built-in date reminder slider, making it a portable insect control solution ideal for home or holiday travel. This product is for indoor use and covers an area of up to 40m³. It effectively kills all flying and biting insects around the home, protecting the whole room. The unit is time-indicated for ease of use.