Mosquito Repellent Rechargeable, creates a 20-foot zone of protection against mosquitoes. Ideal for the backyard, poolside, patio, deck, and more. Easy to use, one button keeps mosquitoes away. Powered by a rechargeable lithium-ion battery with up to 5.5 hours of continuous mosquito protection per charge. No fuel to monitor and replace. Emits scent-free repellent that drives away mosquitoes. No smoke, flames, or harsh odors like citronella. Enjoy max protection in 15 minutes. Unscented, liquid repellent cartridges are easy to replace. Repels tough mosquitoes, including those that may transmit Encephalitis, West Nile Virus, and Zika Virus. People and pet friendly.