Comfort Zone with Feliway for cats helps cats deal with the stress and anxiety that causes urine marking and scratching. Comfort Zone with Feliway mimics the natural comforting facial pheromone secreted by cats. When cats sense the facial pheromone around their home they are less likely to urine mark or scratch these areas. Cats can more easily adapt to new places, people and stressful situations with Comfort Zone stress management tool. The Comfort Zone with Feliway Plug-in Diffuser for Cats kit contains one plug-in diffuser and one 48 ml bottle. Each bottle covers a 500-600 square feet and lasts approximately four weeks.