The Thermacell MR300 Portable Mosquito Repeller is the best portable defense against mosquitoes, providing an invisible, 4.5-meter zone of protection. The Thermacell MR300 Portable Mosquito Repeller comes with a fuel cartridge and 3 repellent mats that produce 12 hours of freedom from the worry of mosquito bites. The MR300 uses an interior-heating element to activate mosquito repellent contained in the blue repellent mats to create a zone of protection that stops mosquitoes before they come close to your skin. The efficient design of the repeller means no open flame, no recharging, no cords and no spray to mess with. Its compact, lightweight size makes it portable and easy to store or pack on-the-go. Scent-free and with no sticky sprays, the MR300 creates an ideal mosquito-free environment the whole family can enjoy from the backyard to the great outdoors. All Thermacell products comes with a 100% Satisfaction Guarantee. Turn it On…Mosquitoes Gone!