The Thermacell R-1 Mosquito Repellent Refill 12-hour Pack effectively repels mosquitoes and other biting insects by creating a 15-foot zone of protection for bug-free comfort. This pack is compatible with all Thermacell Portable Mosquito Repellents, Lanterns, and Torches. Ideal for use while hiking, gardening, camping, fishing and hanging around the backyard, patio and balcony. Thermacell Repellents are approved by EPA (United States of America) and NEA (Singapore). For use in fuel-powered Thermacell Portable Mosquito Repellents, Lanterns, and Torches Each repellent mat lasts up to 4 hours and each fuel cartridge lasts up to 12 hours 15-foot mosquito protection zone. Turn it on...Mosquitoes GONE! No spray, no lotion and no mess. Scent-free and DEET-free. Active ingredient is allethrin, a synthetic version of a naturally occurring repellent found in chrysanthemum flowers Package contains: 3 repellent mats and 1 fuel cartridge no special requirements Singapore