The Thermacell Backpacker Mosquito Repeller effectively repels mosquitoes by creating a 15-foot (4.5 m) zone of protection. Utilizing the same camping gas canisters (not included) that backpackers and campers likely have in their bag already, the compact and lightweight Backpacker Repeller is an essential piece of gear. It's also ideal for use while fishing, gardening, hunting, around the backyard, and more. Lightweight, minimalist design that shaves ounces and inches out of your pack (114g/4.0 oz). Compact and portable (97mm H x 50mm W x 67mm L). Scent-free. No open flame. Includes 3 insect repellent mats lasting 4 hours each + 1 water-resistant travel bag.