ThermaCELL mosquito repellent patio lantern repels black flies, mosquitoes, and other flying pests while providing ambient light. Repellent and light can be used together or separately. Ideal for backyards, decks, picnics, barbecues, camping, and outdoor parties. Easy to use, no candle or open flame. Turn lantern top to activate. Virtually odorless, no lotions, sprays, or oils. Silent operation. Repellent operates on a butane cartridge. Butane heats repellent mat that releases allethrin, a synthetic copy of a natural repellent. Features 3 LED (light emitting diodes) lights and a handle for hanging or carrying the lantern. Lights operate on 3 AAA batteries, not included. Includes 1 reusable repellent lantern, 1 butane cartridge (lasts up to 12 hours), and 3 insect repellent mats (lasts up to 4 hours each). 6-1/2" H. 100% satisfaction guaranteed. EPA (Environmental Protection Agency) registered.