This kit contains Pyrethrin and provides automatic 24-Hour flying insect control. It kills and repels flies, gnats and mosquitoes. Dispenses every 15 minutes and is EPA Registered and USDA Rated. 5-Year dispenser warranty. Operates with 2 D-batteries. Lasts 30 days. KIT INCLUDES: One Dispenser and One 30 Day Canister Refills sold separately - SLT101582.