Powered by a small butane cartridge, the portable Thermacell MR450 Mosquito Repeller drives mosquitoes and other biting insects up to 15 ft. away. The compact and lightweight unit features design enhancements over the company’s original repeller, including rubber armor, a Zone indicator light and enhanced grill for maximum air flow. One CR2032 battery is required for using the Zone indicator light. Price: $35. Contact: Thermacell; (781) 541-6900; thermacell.com.