• A 15-foot mosquito-free zone is created with Thermacell Mosquito Repellent, making it an effective mosquito repellent. All fuel-powered Thermacell repellers are compatible with this 48-hour refill pack (cartridges only) (except the Backpacker).
• TECHNOLOGY ACTIVATED BY HEAT: No batteries or cables required. powered by a convenient 12-hour fuel cartridge that is safe. emits odorless repellent that keeps insects at bay. When it's time to replace them, unscented repellent mats change color and last up to 4 hours apiece.
• EFFECTIVELY REPEL WITHOUT SPRAY OR SCENT: Keep mosquitoes away from your skin without applying DEET sprays or lotions. No flames, smoke, or offensive smells like citronella. Get maximum defense in 15 minutes. No mess, and filling is simple.

FORMULA FOR SYNTHETIC ALLETHRIN INSPIRED BY PLANT EXTRACTS: We used plant extracts to create our synthetic allethrin. independently evaluated by the EPA for safety and efficacy. pet- and people-friendly