• Within minutes, the unit creates head-to-toe protection from mosquitoes for up to 12 hours. If you move, allow a few minutes • To prolong the refill's life between uses, close the unit by sliding the switch to the "" position. Store the unit in a cool, dry place-never in a hot car, glove compartment, or trunk. • Replace the refill when the green use-up indicator dries up for the unit to rebuild its personal protection. (Repeat Steps 1 and 2). For best results, replace refill 14 days after opening or after 12 hours total use. • You can also place the unit next to you on a table, bench or other suitable hard surface (away from food and sources of heat, ignition, or moisture). When placing unit on a surface, lay the unit on its clip to allow open circulation of repellent.