Mosquitoes can disrupt outdoor activities like dining, parties, camping, or relaxing on your patio. Thermacell's award-winning technology keeps mosquitoes away by creating a 15FT protection zone around you. Our proprietary formula precisely targets 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. Powered by a camping fuel canister (not included). Fuel canister must be pressurized self-sealing (iso)butane and propane fuel mix of 70% Butane/30% Propane.16 hours of mosquito repellent included.