Hot Shot No-Pest Strip, Kills Flying And Crawling Insects, Penetrating Vapor, 1-Count KILLS: Kills flies, moths, cockroaches, silverfish, spiders and other insects as listed. HANGING STRIP: Just hang up in garages, sheds, storage units, attics and crawl spaces occupied by people less than 4 hours per day. CONTROLLED-RELEASE TECHNOLOGY: Simply remove from package to begin controlling action  keeps protecting for up to 4 months. PENETRATING VAPOR: Clean, odorless, deep-penetrating vapor is distributed throughout the treatment area. USAGE AREA: One strip treats a 10 foot x 13 foot enclosed room with an 8-foot ceiling.