If citronella candles and other old-fashioned methods for keeping mosquitoes away just aren't working for you, fire up the ThermaCELL Lantern or Portable repellent and enjoy your next outing in bug-free peace. A butane cartridge heats a chemically treated repellent mat that keeps mosquitoes out of a 225-square-foot area for up to 12 hours. They're fully cordless and portable and require no messy wax.