Mosquito 48 Hours Repellent Refill by Thermacell®. The Mosquito Repellent Refill 48-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.