PIC Mosquito Repelling Sticks help to repel mosquitoes in confined areas outdoors. Each box contains 5 sticks that help repel mosquitos. Mosquito stick will burn approximately 3 - 4 hours. For outdoor use. It is useful in places where there is little or no breeze such as patios and porches. Do not use indoors. STEPS: Remove sticks from the box; ignite the tip until it flames; blow out flame; let it smoke; place sticks into ground 10-12 feet apart.