The Thermacell Mosquito repellent wand comes with a box of 4 refills and 12 mats, providing 12 hours of protection against mosquitoes per each cartridge. A total of 5 cartridges and 15 mats included ( 1 cartridge and 3 mats with the wand). The wand covers a 15" by 15" area. This outdoor repellent is designed to be used in a wand format, making it easy to carry and apply wherever you go camping, hiking, or participating in other outdoor activities. With a focus on repelling/deterring mosquitoes, this Thermacell product is effective in keeping pesky insects at bay while enjoying the great outdoors.