Begins working when the lid is removed to fumigate insects effectively. Features: 1. Heats up when in contact with air and disperses an effective vapor. 2. Kills all exposed insects: cockroaches, house ticks, bedbugs, fleas, flies, mosquitoes, gnats, etc. 3. Flashing effect - infected insects will die after being flushed out from where they hide and breed. 4. Easy to use - just remove the cap. 5. Safe pyrethrin chemical used. 6. Applications: cabin, galley, store rooms, etc. Instructions for use: 1. Open cabinets, doors and drawers in the area to be treated. 2. Close doors and windows and shut off all fans and air conditioning. 3. Place the canister in the center of the room. 4. Exit after opening the lid and keep the area closed for 1 - 3 hours.