Thermacell Radius Zone Mosquito Repellent Refill is specifically designed to work with the Thermacell Radius Zone Mosquito Repellent, providing up to 40 hours of effective mosquito protection. This fully sealed refill covers a 15-foot area, creating a comfortable zone from mosquitoes. I for outdoor use, it is both scent- and DEET-, making it safe and pleasant for you and those around you. The package includes one 40-hour refill to keep your mosquito repellent device functioning efficiently. Model Number: