Repel 94129 Mosquito Repellent Lantern Refill, Pack of 1 Each cartridge lasts up to 3 months Provides up to 64 sq. ft. of protection Provides DEET-free protection Ultra-quite fan This is a refill for Repel Mosquito Repellent Lantern (HG-94128) Each cartridge lasts up to 3 months Deet-free formula Contains technology that inhibits mosquitoes' sensor receptors so they can't find you