ThermaCELL MR-9C Mini Cordless Portable Mosquito Repellent Lantern Repels up to 98% of mosquitoes. Also repels black flies and no-see-ums Provides a 15 x 15 ft Mosquito Free Zone, the size of an average deck or patio Small and portable. Take them anywhere as it fits in the palm of your hand No messy sprays or lotions applied to the skin No candles, no open flame, no messy wax, no citronella smell