PIC Mosquito Repelling Sticks help to repel mosquitoes outdoors. It's best used in places where there is little or no breeze such as patios and porches. Do not use indoors.• For Outdoor Use Only• Place One Every 10'• Use on Patios and Porches• Repels Mosquitoes That May Transmit Zika Virus Place one every 10' For outdoor use only | PIC Mosquito Repelling Sticks, 5-Pack