The Country Vet Country Home Flying Insect Kit is great for the farm or ranch in controlling flies, mosquitoes and moths. This dual-purpose kit activates in 15 minutes and acts as an air freshener for fragrance and odor control. Refills last up to 30 days and two D-cell batteries are required (not included). The kit also includes one dispenser, one 6.4 oz fly spray, and one 6.6 oz air freshener.