Mosquitoes ruin everything. 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. The multi-insect refills also repel black flies and no-see-ums. Not for the common house fly. This refill pack is compatible with all Thermacell fuel-powered repellers (except the Backpacker). Comes with 60 hours of multi-insect repellent and fuel.