SCIENTIFICALLY PROVEN MOSQUITO PROTECTION: Thermacell is tested and proven to repel mosquitoes from a 15FT zone. This convenient starter pack comes complete with a repeller, travel bag, and 16 hours of DEET-free refill. Trusted by outdoor experts including backpackers, campers, and hunters for over 25 years. Weighs only 4 ounces. Packaging may vary. 15FT ZONE OF MOSQUITO PROTECTION: Engineered to precisely diffuse heat-activated repellent, creating a large zone of protection. Consistent repellent protection won’t weaken over time. The Fuel-ZoneGuard Backpacker repeller is 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. EASY TO USE, NO SPRAY NEEDED: On-demand mosquito repellent starts heating immediately, reaching max protection in 15 minutes. No need to apply sticky DEET sprays or lotions, clean up dead bugs, or reapply to your yard throughout the season. Unscented repellent mats last up to 4 hours each and change color when time to replace. Scent-free, no smoke, and no flames. PEOPLE AND PET FRIENDLY: Independently tested and EPA reviewed for safety & effectiveness. Repels tough mosquitoes. For outdoor use only. 100% SATISFACTION GUARANTEE: At Thermacell, we stand behind the performance and quality of our products. If you are not happy with your purchase, you may return it to us for repair, replacement or refund. Please contact service@thermacell.com.