STEM Flying Insect Killer is a bug spray made with botanical extracts that are deadly for bugs. STEM's scientists decode the power of nature to protect your family safely* from pests. STEM plant-based active ingredient bug spray kills flies, mosquitoes, and gnats. This insecticide has no added dye, fragrance, or harsh chemical odors, and is made using natural ingredients for indoor and outdoor use to make any space a bug-free zone. STEM's flying insect killer spray is safe for use around kids and pets* and is tested by entomologists. Rooted in Nature, Optimized by Science. *When used as directed.