OFF! Backyard Refills are sold separately for use with OFF! Backyard Mosquito Lamps. The heated pad releases an insecticide that effectively repels mosquitoes for up to 6 hours. Protect any outdoor party, shindig, or festivity with the OFF! Mosquito Lamp, while maintaining the ambiance of your outdoor space. Each OFF! Mosquito Lamp lasts for up to 6 hours, providing long lasting protection. Just light it and relax, simply activate the diffuser by lighting the candle. OFF! Mosquito Lamp is designed for your outdoor patio area and repels mosquitoes in an area of 3.05m x 3.05m. Don’t let mosquitoes ruin your summer. • Activated heated diffuser that releases airborne insect repellent​• Long lasting repellent protects from mosquitoes for up to 6 hours​• Provides great coverage, repelling mosquitoes in an area up 3.05m x 3.05m​• Repels mosquitoes from an average size patio​• No Application Required: Effective mosquito repellent you don't have to put on.​• Accent your patio while providing repellency​• Contains: 2 Candles and 2 Diffusers​• For outdoor use only. Do not use in a tent or enclosed area