Use this citronella-scented spray refill with the Intellipet® Citronella Anti-Bark Dog Collar to effectively and humanely stop nuisance barking. These Refill Sprays are designed for use with the Intellipet® Citronella Anti-Bark Dog Collars. Each 2.4 oz can contains harmless, non-staining citronella-scented spray that is released from the collar when dogs bark, distracting them with a spritz of spray and conditioning them to stop barking. Each refill lasts for approximately 18-23 uses.Each refill provides approximately 18-23 uses. Spray is non-toxic, non-staining, and hypoallergenic. Ingredients: Ethanol, 1,1,1,2 Tetrafluoroethane, and Fragrance