Smith Performance Sprayers Professional Pest Control Electric Thermal Fogger The same effective system used by professionals to kill mosquitoes that may carry the West Nile virus. Professionally kill and repel pests for up to 6 hours Specially designed heating element to propel fog instantly when reaching adjusted temperature For thermal fogging only use products formulated specifically for thermal fogging: oil or water-based solutions containing propylene glycol oils Utilizes a 110V power supply