Bugables work by emitting an aura of all natural, plant-based essential oils, This scent masks the odors humans emit that attract insects effectively making you smell like a plant and invisible to insects, How long will each sticker repel 200 Hours, How large of an area does it protec 4 to 6 feet per sticker, Are there any chemicals The repellent is formulated with 100 Natural Oils, Lemongrass, Geraniol and Citronella, 5 stickers per pacakge, Dimensions: 0, 75L x 6, 5H x 5W, SKU: EDGE003