The Thermacell Patio Shield Mosquito Repellent Lantern effectively repels mosquitoes by creating a 15 feet zone of protection. It’s small and compact design along with ambient light feature makes it perfect for any deck or patio. Use your Patio Shield repellent for entertaining guests, gardening, camping, around the backyard and more. Package contains: lantern and 12 hours of refills- 3 repellent mats and fuel cartridge.