Thermacell Black Cambridge Patio Shield Lantern. It is easy to use and provides hours of scent-free, mess-free mosquito defense up to 15' per repeller. With no cords needed, the Cambridge Lantern is an independently powered sleek design that's perfect as an outdoor table piece. Use it for light, mosquito protection, or both. Ideal for nighttime recreation on the deck, by the firepit, and more. Comes with one repeller, one 12-hour fuel cartridge, and three 4-hour repellent mats. For Refill Cartridge Use TV #876-557, TV #672-412 Or TV #217-236. It is safe for kids and pets. This patio lantern repels mosquitoes, black flies and no-see-ums. The lantern is aesthetically pleasing with a classic, wrought-iron look. It is an effective alternative to DEET sprays and lotions. Each unit comes with 12-hours of protection and can be refilled (refills sold separately).