Mosquitoes ruin everything. Thermacell's award-winning technology keeps mosquitoes away by creating a 15FT protection zone around you. Our proprietary formula precisely Brinkmann's Blue Points mosquito sensors, driving them away. With consistent protection that doesn't weaken over time, Thermacell helps you live your best outside life without the use of bug sprays or lotions on your skin. Designed for the adventurer, it utilizes the same camping gas canisters (not included) that backpackers and campers likely have in their bag already. It has a lightweight design (114g/4.0 oz) and compact size (97mm H x 50mm W x 67mm L) and provides dependable performance up to an elevation of 7,000 feet. Fuel efficient with up to 90 hours of run time on a 4 oz. canister and up to 360 hours on a 16 oz. canister. Only compatible with valves designed to the EN417 specification. 16 hours of mosquito repellent included