The Thermacell Outdoor Lantern is a portable, lightweight light source that also repels mosquitoes, black flies and 'no-see-ums' creating a 15x15 ft. comfort zone. The lantern function requires 4 AA batteries (not included) and features low and high illumination settings. The package includes a reusable lantern, three insect repellent mats and one butane cartridge to provide up to 12 hours of continuous operation. Use may be divided.