EFFECTIVE MOSQUITO PROTECTION: Thermacell Mosquito Repellent, Rechargeable Lighted E-Series EL55 creates a 20-foot zone of protection against mosquitoes - 80% more area than our original line. Easy to use, one button keeps mosquitoes away. Now with dimmable, warm light to enhance your outdoor experience.HEAT-ACTIVATED TECHNOLOGY: Powered by a rechargeable Li-ion battery, with up to 9 hours of mosquito protection when using only repeller; up to 5.5 hours when also using light. The light operates independently from repeller.EFFECTIVELY REPEL WITHOUT SPRAY OR SCENT: Repel mosquitoes without DEET sprays or lotions on your skin. No smoke, flames, or strong scents like citronella. Enjoy maximum protection in 15 minutes. Active Ingredient: Metofluthrin.LONG-LASTING DEFENSE: 12 hours of mosquito repellent included. Unscented, liquid repellent cartridge is easy to replace. Stay protected even longer with a 40-hour repellent refill (sold separately).ADVANCED REPELLENT: Independently tested and EPA reviewed for safety & effectiveness. Repels tough mosquitoes, including those that may transmit Encephalitis, West Nile Virus, and Zika Virus. People and pet friendly.