Multiple natural ingredients work in different ways: as an irritant to the mouth, nose or gut, or triggering the deer's natural instinct to escape/avoid. Also disguises the plants natural smell which attracts deer in the first place. The innovative delivery system includes six diffusers and 12 ounces of Scent-inal Activator. Simply fill the diffusers and a cotton wick disperses the odor, deterring deer for 3 months. Then refill. The all-natural activator includes cinnamon and garlic oils. You get enough to keep deer away for a full year! Includes six diffusers and six twist ties to attach them to shrubs, etc. Activator has an applicator top to make it easy to refill the diffuser without spilling.