The Thermacell MR-9W Mosquito Repeller Cambridge Lantern effectively repels mosquitoes, black flies, and other biting insects by creating a 15 x 15-foot zone of protection for bug-free comfort. Its ambient light and decorative design perfectly adorn your deck or patio. Ideal for use while you are gardening, observing outdoor sporting events, and hanging around the backyard, Thermacell Lanterns have been evaluated by the EPA for safety and effectiveness. Works with all Thermacell repellent mats and refills. Includes: Thermacell Cambridge Lantern, 3 Original repeller mats, 1 butane cartridge. Requires 4 AA-batteries (not included).